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A couple has two children. Find the prob...

A couple has two children. Find the probability that
(i) both the children are boys, if it is known that the older child is a boy.
(ii) both the children are girls, if it is known that the older child is a girl.

Text Solution

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The correct Answer is:
`thereforeP(A nn B) = 1/4 " "therefore P(A//B) = (P(A nn B))/(P(B)) = (1)/((4)/((2)/(4))) = 1/2`
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