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Probability of a couple having a boy child is 0.4. If a couple decides : Multiple-choice Questions — Select One Answer Choice

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Probability of a couple having a boy child is 0.4. If a couple decides [#permalink]
Expert Reply
If you have 3 children and all are boys the probability is 1

If you want at least one girl subtract from 1 the chances to have three boys

You can have GBB,GGB,GGG, BBB

But we are looking for to have at least one girl (last case above)

1-(0.4*0.4*0.4)=1-0.064=0.936

D is the answer
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Probability of a couple having a boy child is 0.4. If a couple decides [#permalink]
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