1.

Assume that each born child is equally likely to be a boy or a girl. If a family has two children,what is the conditional probability that both are girls given that atleast one is a girl

Answer»

Solution :Let C be the event taht out of the two children in the family atleast one is a girl.Then C={GB,BG,GG}.`rArr AnnC={GG}`
THEREFORE `P(AnnC)`=1/4and P (C)=3/4
Hence,the requried probability


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