Question 428232: a couple plans to have 5 children. what is the probability of having exactly two boys? Found 2 solutions by stanbon, Alan3354:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! a couple plans to have 5 children. what is the probability of having exactly two boys?
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The births are independent events.
Ans: (1/2)(1/2) = 1/4
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Cheers,
Stan H.
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You can put this solution on YOUR website! There are 32 possible combinations of 5 children,
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GGGGG
GGGGB
GGGBG
GGGBB
GGBGG
GGBGB
GGBBG
GGBBB
GBGGG etc
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8 of the combinations have exactly 2 boys
8/32 = 1/4
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