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probability of x losers in n trials



The Next CEO of Stack OverflowProbability I lost when my friend told me I lost$1 bet, 1000 events, 45% chance of winning each event. What are the odds of winning?Roulette paradox - martingale probability after leaving tableRoulette: a Naive, but Fundamental Question about Probabilitycan this cashback casino promotion be exploited?Roulette probability - something doesn't add upCalculating Risk of Ruin for known profit/loss and probabilitiesWhy is the casino losing money?When gambling, do I get my money's worth? (Or: Does the amount I lose per bet determine the number of bets until I lose all my money?)Kelly Criterion for a finite number of bets










0












$begingroup$


I am new here and I am not sure if this is the correct place to ask this question.



It seems like a simple probability question but I am stuck on it. It is a problem I am trying to solve.



Lets say I have 43 bets.
The probability of a bet winning is 0.64.
The probability of a bet losing is 0.36.



What is the probability that 29 of those 43 bets will be losing/losers?



I worked it out like this:



29 / 43 = 67%
0.36 * 67 = 24.12% chance that 29 of those 43 bets will be losing/losers.



But this seems very simplistic and incorrect to me. Because for example - when the number of bets goes up e.g. 43 goes up to 100 bets. The probability that 29 of those 100 bets losing goes down to say 10.44%. Which seems wrong to me. Because I think if the number of bets goes up, then the probability of losing a fixed number of 29 should also go up, as there are higher "chances" of losing.



Could you list the correct answer, working out and possibly a link where I can read to learn more.



I did read up on this, but there were so many ways of achieving this. I read about Binomial distributions etc, but the answers I kept calculating just seemed very wrong to me.



Many Thanks!










share|cite|improve this question







New contributor




Nathan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$
















    0












    $begingroup$


    I am new here and I am not sure if this is the correct place to ask this question.



    It seems like a simple probability question but I am stuck on it. It is a problem I am trying to solve.



    Lets say I have 43 bets.
    The probability of a bet winning is 0.64.
    The probability of a bet losing is 0.36.



    What is the probability that 29 of those 43 bets will be losing/losers?



    I worked it out like this:



    29 / 43 = 67%
    0.36 * 67 = 24.12% chance that 29 of those 43 bets will be losing/losers.



    But this seems very simplistic and incorrect to me. Because for example - when the number of bets goes up e.g. 43 goes up to 100 bets. The probability that 29 of those 100 bets losing goes down to say 10.44%. Which seems wrong to me. Because I think if the number of bets goes up, then the probability of losing a fixed number of 29 should also go up, as there are higher "chances" of losing.



    Could you list the correct answer, working out and possibly a link where I can read to learn more.



    I did read up on this, but there were so many ways of achieving this. I read about Binomial distributions etc, but the answers I kept calculating just seemed very wrong to me.



    Many Thanks!










    share|cite|improve this question







    New contributor




    Nathan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.







    $endgroup$














      0












      0








      0





      $begingroup$


      I am new here and I am not sure if this is the correct place to ask this question.



      It seems like a simple probability question but I am stuck on it. It is a problem I am trying to solve.



      Lets say I have 43 bets.
      The probability of a bet winning is 0.64.
      The probability of a bet losing is 0.36.



      What is the probability that 29 of those 43 bets will be losing/losers?



      I worked it out like this:



      29 / 43 = 67%
      0.36 * 67 = 24.12% chance that 29 of those 43 bets will be losing/losers.



      But this seems very simplistic and incorrect to me. Because for example - when the number of bets goes up e.g. 43 goes up to 100 bets. The probability that 29 of those 100 bets losing goes down to say 10.44%. Which seems wrong to me. Because I think if the number of bets goes up, then the probability of losing a fixed number of 29 should also go up, as there are higher "chances" of losing.



      Could you list the correct answer, working out and possibly a link where I can read to learn more.



      I did read up on this, but there were so many ways of achieving this. I read about Binomial distributions etc, but the answers I kept calculating just seemed very wrong to me.



      Many Thanks!










      share|cite|improve this question







      New contributor




      Nathan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.







      $endgroup$




      I am new here and I am not sure if this is the correct place to ask this question.



      It seems like a simple probability question but I am stuck on it. It is a problem I am trying to solve.



      Lets say I have 43 bets.
      The probability of a bet winning is 0.64.
      The probability of a bet losing is 0.36.



      What is the probability that 29 of those 43 bets will be losing/losers?



      I worked it out like this:



      29 / 43 = 67%
      0.36 * 67 = 24.12% chance that 29 of those 43 bets will be losing/losers.



      But this seems very simplistic and incorrect to me. Because for example - when the number of bets goes up e.g. 43 goes up to 100 bets. The probability that 29 of those 100 bets losing goes down to say 10.44%. Which seems wrong to me. Because I think if the number of bets goes up, then the probability of losing a fixed number of 29 should also go up, as there are higher "chances" of losing.



      Could you list the correct answer, working out and possibly a link where I can read to learn more.



      I did read up on this, but there were so many ways of achieving this. I read about Binomial distributions etc, but the answers I kept calculating just seemed very wrong to me.



      Many Thanks!







      probability statistics expected-value gambling






      share|cite|improve this question







      New contributor




      Nathan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|cite|improve this question







      New contributor




      Nathan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|cite|improve this question




      share|cite|improve this question






      New contributor




      Nathan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked Mar 27 at 18:58









      NathanNathan

      1




      1




      New contributor




      Nathan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      New contributor





      Nathan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      Nathan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.




















          2 Answers
          2






          active

          oldest

          votes


















          1












          $begingroup$

          Let's indicate with $1$ a victory and with $0$ a loss. We can create so a bijection between all the possible results of a series of $43$ bet and a binary number of $43$ ciphers. In particular, we are searching all of the binary number in this form:



          $$underbrace1...1_14 text timesunderbrace0...0_29 text times$$



          All of the possible permutations of this binary number are:



          $$P_(43,14,29)=frac43!14!29!$$



          The probability of each permutation is:



          $$p(P)=(0,64)^14(0,36)^29$$



          This must be multiplied for the number of permutation. So the searched probability $p(E)$ is:



          $$p(E)=p(P)P_(43,14,29)=(0,64)^14(0,36)^29frac43!14!29!=0.002 %$$



          :)






          share|cite|improve this answer










          New contributor




          Eureka is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.






          $endgroup$












          • $begingroup$
            Hi Eureka, Thanks for your answer. I read your comment above that the above answer switched the probabilities. The funny thing is...If I switch the above answers probabilities. 43 choose 29 .36^29 (1-.36)^43-29 = 0.002% Which is the exact same answer as yours! Is this correct then? (please excuse if my math formatting is incorrect, as I am still learning how to use formatting on the site)
            $endgroup$
            – Nathan
            Mar 27 at 19:39










          • $begingroup$
            Hi :) , I meant that he switched the exponents because clearly $binomnn-k=binomnk$. Indeed our results are different as you see.
            $endgroup$
            – Eureka
            Mar 27 at 19:43











          • $begingroup$
            So are both the answers correct? or just yours above? thanks :-)
            $endgroup$
            – Nathan
            Mar 27 at 19:47











          • $begingroup$
            For sure they aren't both correct: math is just one ahaha. I think that he's wrong because he wrote $(0.64)^29$ , but you requested 29 losses not 29 winnings.
            $endgroup$
            – Eureka
            Mar 27 at 19:49










          • $begingroup$
            Yes true! haha, I will try to build your answer in Excel over next few days, thanks!
            $endgroup$
            – Nathan
            Mar 27 at 20:49


















          0












          $begingroup$

          $$43 choose 29 (1-.64)^29 .64^43-29 = 0.0000205822$$






          share|cite|improve this answer











          $endgroup$












          • $begingroup$
            You switched the two probabilities.
            $endgroup$
            – Eureka
            Mar 27 at 19:26










          • $begingroup$
            Hi David, thanks for your answer. I guess it is just binomial coefficient * pk(1-p)(n-k) Which is similiar to what is explained here mathsisfun.com/data/binomial-distribution.html
            $endgroup$
            – Nathan
            Mar 27 at 19:28










          • $begingroup$
            I managed to replicate your answer in Excel using the COMBIN for the binomial coefficient calculation, thanks!
            $endgroup$
            – Nathan
            Mar 27 at 19:29










          • $begingroup$
            Thanks for the correction David! thanks for the answer
            $endgroup$
            – Nathan
            Mar 27 at 20:50











          Your Answer





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          2 Answers
          2






          active

          oldest

          votes








          2 Answers
          2






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          1












          $begingroup$

          Let's indicate with $1$ a victory and with $0$ a loss. We can create so a bijection between all the possible results of a series of $43$ bet and a binary number of $43$ ciphers. In particular, we are searching all of the binary number in this form:



          $$underbrace1...1_14 text timesunderbrace0...0_29 text times$$



          All of the possible permutations of this binary number are:



          $$P_(43,14,29)=frac43!14!29!$$



          The probability of each permutation is:



          $$p(P)=(0,64)^14(0,36)^29$$



          This must be multiplied for the number of permutation. So the searched probability $p(E)$ is:



          $$p(E)=p(P)P_(43,14,29)=(0,64)^14(0,36)^29frac43!14!29!=0.002 %$$



          :)






          share|cite|improve this answer










          New contributor




          Eureka is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.






          $endgroup$












          • $begingroup$
            Hi Eureka, Thanks for your answer. I read your comment above that the above answer switched the probabilities. The funny thing is...If I switch the above answers probabilities. 43 choose 29 .36^29 (1-.36)^43-29 = 0.002% Which is the exact same answer as yours! Is this correct then? (please excuse if my math formatting is incorrect, as I am still learning how to use formatting on the site)
            $endgroup$
            – Nathan
            Mar 27 at 19:39










          • $begingroup$
            Hi :) , I meant that he switched the exponents because clearly $binomnn-k=binomnk$. Indeed our results are different as you see.
            $endgroup$
            – Eureka
            Mar 27 at 19:43











          • $begingroup$
            So are both the answers correct? or just yours above? thanks :-)
            $endgroup$
            – Nathan
            Mar 27 at 19:47











          • $begingroup$
            For sure they aren't both correct: math is just one ahaha. I think that he's wrong because he wrote $(0.64)^29$ , but you requested 29 losses not 29 winnings.
            $endgroup$
            – Eureka
            Mar 27 at 19:49










          • $begingroup$
            Yes true! haha, I will try to build your answer in Excel over next few days, thanks!
            $endgroup$
            – Nathan
            Mar 27 at 20:49















          1












          $begingroup$

          Let's indicate with $1$ a victory and with $0$ a loss. We can create so a bijection between all the possible results of a series of $43$ bet and a binary number of $43$ ciphers. In particular, we are searching all of the binary number in this form:



          $$underbrace1...1_14 text timesunderbrace0...0_29 text times$$



          All of the possible permutations of this binary number are:



          $$P_(43,14,29)=frac43!14!29!$$



          The probability of each permutation is:



          $$p(P)=(0,64)^14(0,36)^29$$



          This must be multiplied for the number of permutation. So the searched probability $p(E)$ is:



          $$p(E)=p(P)P_(43,14,29)=(0,64)^14(0,36)^29frac43!14!29!=0.002 %$$



          :)






          share|cite|improve this answer










          New contributor




          Eureka is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.






          $endgroup$












          • $begingroup$
            Hi Eureka, Thanks for your answer. I read your comment above that the above answer switched the probabilities. The funny thing is...If I switch the above answers probabilities. 43 choose 29 .36^29 (1-.36)^43-29 = 0.002% Which is the exact same answer as yours! Is this correct then? (please excuse if my math formatting is incorrect, as I am still learning how to use formatting on the site)
            $endgroup$
            – Nathan
            Mar 27 at 19:39










          • $begingroup$
            Hi :) , I meant that he switched the exponents because clearly $binomnn-k=binomnk$. Indeed our results are different as you see.
            $endgroup$
            – Eureka
            Mar 27 at 19:43











          • $begingroup$
            So are both the answers correct? or just yours above? thanks :-)
            $endgroup$
            – Nathan
            Mar 27 at 19:47











          • $begingroup$
            For sure they aren't both correct: math is just one ahaha. I think that he's wrong because he wrote $(0.64)^29$ , but you requested 29 losses not 29 winnings.
            $endgroup$
            – Eureka
            Mar 27 at 19:49










          • $begingroup$
            Yes true! haha, I will try to build your answer in Excel over next few days, thanks!
            $endgroup$
            – Nathan
            Mar 27 at 20:49













          1












          1








          1





          $begingroup$

          Let's indicate with $1$ a victory and with $0$ a loss. We can create so a bijection between all the possible results of a series of $43$ bet and a binary number of $43$ ciphers. In particular, we are searching all of the binary number in this form:



          $$underbrace1...1_14 text timesunderbrace0...0_29 text times$$



          All of the possible permutations of this binary number are:



          $$P_(43,14,29)=frac43!14!29!$$



          The probability of each permutation is:



          $$p(P)=(0,64)^14(0,36)^29$$



          This must be multiplied for the number of permutation. So the searched probability $p(E)$ is:



          $$p(E)=p(P)P_(43,14,29)=(0,64)^14(0,36)^29frac43!14!29!=0.002 %$$



          :)






          share|cite|improve this answer










          New contributor




          Eureka is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.






          $endgroup$



          Let's indicate with $1$ a victory and with $0$ a loss. We can create so a bijection between all the possible results of a series of $43$ bet and a binary number of $43$ ciphers. In particular, we are searching all of the binary number in this form:



          $$underbrace1...1_14 text timesunderbrace0...0_29 text times$$



          All of the possible permutations of this binary number are:



          $$P_(43,14,29)=frac43!14!29!$$



          The probability of each permutation is:



          $$p(P)=(0,64)^14(0,36)^29$$



          This must be multiplied for the number of permutation. So the searched probability $p(E)$ is:



          $$p(E)=p(P)P_(43,14,29)=(0,64)^14(0,36)^29frac43!14!29!=0.002 %$$



          :)







          share|cite|improve this answer










          New contributor




          Eureka is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.









          share|cite|improve this answer



          share|cite|improve this answer








          edited Mar 27 at 19:25





















          New contributor




          Eureka is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.









          answered Mar 27 at 19:18









          EurekaEureka

          438112




          438112




          New contributor




          Eureka is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.





          New contributor





          Eureka is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.






          Eureka is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.











          • $begingroup$
            Hi Eureka, Thanks for your answer. I read your comment above that the above answer switched the probabilities. The funny thing is...If I switch the above answers probabilities. 43 choose 29 .36^29 (1-.36)^43-29 = 0.002% Which is the exact same answer as yours! Is this correct then? (please excuse if my math formatting is incorrect, as I am still learning how to use formatting on the site)
            $endgroup$
            – Nathan
            Mar 27 at 19:39










          • $begingroup$
            Hi :) , I meant that he switched the exponents because clearly $binomnn-k=binomnk$. Indeed our results are different as you see.
            $endgroup$
            – Eureka
            Mar 27 at 19:43











          • $begingroup$
            So are both the answers correct? or just yours above? thanks :-)
            $endgroup$
            – Nathan
            Mar 27 at 19:47











          • $begingroup$
            For sure they aren't both correct: math is just one ahaha. I think that he's wrong because he wrote $(0.64)^29$ , but you requested 29 losses not 29 winnings.
            $endgroup$
            – Eureka
            Mar 27 at 19:49










          • $begingroup$
            Yes true! haha, I will try to build your answer in Excel over next few days, thanks!
            $endgroup$
            – Nathan
            Mar 27 at 20:49
















          • $begingroup$
            Hi Eureka, Thanks for your answer. I read your comment above that the above answer switched the probabilities. The funny thing is...If I switch the above answers probabilities. 43 choose 29 .36^29 (1-.36)^43-29 = 0.002% Which is the exact same answer as yours! Is this correct then? (please excuse if my math formatting is incorrect, as I am still learning how to use formatting on the site)
            $endgroup$
            – Nathan
            Mar 27 at 19:39










          • $begingroup$
            Hi :) , I meant that he switched the exponents because clearly $binomnn-k=binomnk$. Indeed our results are different as you see.
            $endgroup$
            – Eureka
            Mar 27 at 19:43











          • $begingroup$
            So are both the answers correct? or just yours above? thanks :-)
            $endgroup$
            – Nathan
            Mar 27 at 19:47











          • $begingroup$
            For sure they aren't both correct: math is just one ahaha. I think that he's wrong because he wrote $(0.64)^29$ , but you requested 29 losses not 29 winnings.
            $endgroup$
            – Eureka
            Mar 27 at 19:49










          • $begingroup$
            Yes true! haha, I will try to build your answer in Excel over next few days, thanks!
            $endgroup$
            – Nathan
            Mar 27 at 20:49















          $begingroup$
          Hi Eureka, Thanks for your answer. I read your comment above that the above answer switched the probabilities. The funny thing is...If I switch the above answers probabilities. 43 choose 29 .36^29 (1-.36)^43-29 = 0.002% Which is the exact same answer as yours! Is this correct then? (please excuse if my math formatting is incorrect, as I am still learning how to use formatting on the site)
          $endgroup$
          – Nathan
          Mar 27 at 19:39




          $begingroup$
          Hi Eureka, Thanks for your answer. I read your comment above that the above answer switched the probabilities. The funny thing is...If I switch the above answers probabilities. 43 choose 29 .36^29 (1-.36)^43-29 = 0.002% Which is the exact same answer as yours! Is this correct then? (please excuse if my math formatting is incorrect, as I am still learning how to use formatting on the site)
          $endgroup$
          – Nathan
          Mar 27 at 19:39












          $begingroup$
          Hi :) , I meant that he switched the exponents because clearly $binomnn-k=binomnk$. Indeed our results are different as you see.
          $endgroup$
          – Eureka
          Mar 27 at 19:43





          $begingroup$
          Hi :) , I meant that he switched the exponents because clearly $binomnn-k=binomnk$. Indeed our results are different as you see.
          $endgroup$
          – Eureka
          Mar 27 at 19:43













          $begingroup$
          So are both the answers correct? or just yours above? thanks :-)
          $endgroup$
          – Nathan
          Mar 27 at 19:47





          $begingroup$
          So are both the answers correct? or just yours above? thanks :-)
          $endgroup$
          – Nathan
          Mar 27 at 19:47













          $begingroup$
          For sure they aren't both correct: math is just one ahaha. I think that he's wrong because he wrote $(0.64)^29$ , but you requested 29 losses not 29 winnings.
          $endgroup$
          – Eureka
          Mar 27 at 19:49




          $begingroup$
          For sure they aren't both correct: math is just one ahaha. I think that he's wrong because he wrote $(0.64)^29$ , but you requested 29 losses not 29 winnings.
          $endgroup$
          – Eureka
          Mar 27 at 19:49












          $begingroup$
          Yes true! haha, I will try to build your answer in Excel over next few days, thanks!
          $endgroup$
          – Nathan
          Mar 27 at 20:49




          $begingroup$
          Yes true! haha, I will try to build your answer in Excel over next few days, thanks!
          $endgroup$
          – Nathan
          Mar 27 at 20:49











          0












          $begingroup$

          $$43 choose 29 (1-.64)^29 .64^43-29 = 0.0000205822$$






          share|cite|improve this answer











          $endgroup$












          • $begingroup$
            You switched the two probabilities.
            $endgroup$
            – Eureka
            Mar 27 at 19:26










          • $begingroup$
            Hi David, thanks for your answer. I guess it is just binomial coefficient * pk(1-p)(n-k) Which is similiar to what is explained here mathsisfun.com/data/binomial-distribution.html
            $endgroup$
            – Nathan
            Mar 27 at 19:28










          • $begingroup$
            I managed to replicate your answer in Excel using the COMBIN for the binomial coefficient calculation, thanks!
            $endgroup$
            – Nathan
            Mar 27 at 19:29










          • $begingroup$
            Thanks for the correction David! thanks for the answer
            $endgroup$
            – Nathan
            Mar 27 at 20:50















          0












          $begingroup$

          $$43 choose 29 (1-.64)^29 .64^43-29 = 0.0000205822$$






          share|cite|improve this answer











          $endgroup$












          • $begingroup$
            You switched the two probabilities.
            $endgroup$
            – Eureka
            Mar 27 at 19:26










          • $begingroup$
            Hi David, thanks for your answer. I guess it is just binomial coefficient * pk(1-p)(n-k) Which is similiar to what is explained here mathsisfun.com/data/binomial-distribution.html
            $endgroup$
            – Nathan
            Mar 27 at 19:28










          • $begingroup$
            I managed to replicate your answer in Excel using the COMBIN for the binomial coefficient calculation, thanks!
            $endgroup$
            – Nathan
            Mar 27 at 19:29










          • $begingroup$
            Thanks for the correction David! thanks for the answer
            $endgroup$
            – Nathan
            Mar 27 at 20:50













          0












          0








          0





          $begingroup$

          $$43 choose 29 (1-.64)^29 .64^43-29 = 0.0000205822$$






          share|cite|improve this answer











          $endgroup$



          $$43 choose 29 (1-.64)^29 .64^43-29 = 0.0000205822$$







          share|cite|improve this answer














          share|cite|improve this answer



          share|cite|improve this answer








          edited Mar 27 at 19:49

























          answered Mar 27 at 19:08









          David G. StorkDavid G. Stork

          11.5k41533




          11.5k41533











          • $begingroup$
            You switched the two probabilities.
            $endgroup$
            – Eureka
            Mar 27 at 19:26










          • $begingroup$
            Hi David, thanks for your answer. I guess it is just binomial coefficient * pk(1-p)(n-k) Which is similiar to what is explained here mathsisfun.com/data/binomial-distribution.html
            $endgroup$
            – Nathan
            Mar 27 at 19:28










          • $begingroup$
            I managed to replicate your answer in Excel using the COMBIN for the binomial coefficient calculation, thanks!
            $endgroup$
            – Nathan
            Mar 27 at 19:29










          • $begingroup$
            Thanks for the correction David! thanks for the answer
            $endgroup$
            – Nathan
            Mar 27 at 20:50
















          • $begingroup$
            You switched the two probabilities.
            $endgroup$
            – Eureka
            Mar 27 at 19:26










          • $begingroup$
            Hi David, thanks for your answer. I guess it is just binomial coefficient * pk(1-p)(n-k) Which is similiar to what is explained here mathsisfun.com/data/binomial-distribution.html
            $endgroup$
            – Nathan
            Mar 27 at 19:28










          • $begingroup$
            I managed to replicate your answer in Excel using the COMBIN for the binomial coefficient calculation, thanks!
            $endgroup$
            – Nathan
            Mar 27 at 19:29










          • $begingroup$
            Thanks for the correction David! thanks for the answer
            $endgroup$
            – Nathan
            Mar 27 at 20:50















          $begingroup$
          You switched the two probabilities.
          $endgroup$
          – Eureka
          Mar 27 at 19:26




          $begingroup$
          You switched the two probabilities.
          $endgroup$
          – Eureka
          Mar 27 at 19:26












          $begingroup$
          Hi David, thanks for your answer. I guess it is just binomial coefficient * pk(1-p)(n-k) Which is similiar to what is explained here mathsisfun.com/data/binomial-distribution.html
          $endgroup$
          – Nathan
          Mar 27 at 19:28




          $begingroup$
          Hi David, thanks for your answer. I guess it is just binomial coefficient * pk(1-p)(n-k) Which is similiar to what is explained here mathsisfun.com/data/binomial-distribution.html
          $endgroup$
          – Nathan
          Mar 27 at 19:28












          $begingroup$
          I managed to replicate your answer in Excel using the COMBIN for the binomial coefficient calculation, thanks!
          $endgroup$
          – Nathan
          Mar 27 at 19:29




          $begingroup$
          I managed to replicate your answer in Excel using the COMBIN for the binomial coefficient calculation, thanks!
          $endgroup$
          – Nathan
          Mar 27 at 19:29












          $begingroup$
          Thanks for the correction David! thanks for the answer
          $endgroup$
          – Nathan
          Mar 27 at 20:50




          $begingroup$
          Thanks for the correction David! thanks for the answer
          $endgroup$
          – Nathan
          Mar 27 at 20:50










          Nathan is a new contributor. Be nice, and check out our Code of Conduct.









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