SOLUTION: a couple has 4 children find the probability 3 are girls

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Question 269015: a couple has 4 children find the probability 3 are girls
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
a couple has 4 children find the probability 3 are girls
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It's the same as the probability of having 1 boy.
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P(3 girls in 4) = 4C3(1/2)^3(1/2) = 4(1/2)^4 = 4(1/16) = 1/4
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Cheers,
Stan H.