SOLUTION: If a couple plans to have 7 children, find the probability of them having more than 4 boys.

Algebra ->  Permutations -> SOLUTION: If a couple plans to have 7 children, find the probability of them having more than 4 boys.      Log On


   

Question 1159325: If a couple plans to have 7 children, find the probability of them having more than 4 boys.
Answer by greenestamps(13198) About Me  (Show Source):
You can put this solution on YOUR website!


P(5 boys) = C%287%2C5%29%2F2%5E7+=+21%2F128
P(6 boys) = C%287%2C6%29%2F2%5E7+=+7%2F128
P(7 boys) = C%287%2C7%29%2F2%5E7+=+1%2F128

P(more than 4 boys) = 21%2F128%2B7%2F128%2B1%2F128+=+29%2F128

Convert to decimal or percent if required....