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The Grammar club has 20 members: 10 boys and 10 girls. A 4-person committee is chosen at random. What is the probability that the committee has at least 1 boy?

 Jun 15, 2021
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Probability   =   [ 1   -   P ( no boy) ]   =

 

1  -  C(10,4)  / C(20,8)  =

 

1   -  210  /  125970    =

 

4192 /  4199  ≈   .998  ≈   99.8%

 

 

cool cool cool

 Jun 15, 2021

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