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Questions  >>  CBSE XII  >>  Math  >>  Probability
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Assume that in a family,each child is equally likely to be a boy or a girl.A family with three children is chosen at random.The probability that the eldest child is a girl given that the family has at least one girl is

$\begin{array}{1 1}(A)\;\frac{1}{2}\quad(B)\;\frac{1}{3}\quad(C)\;\frac{2}{3}\quad(D)\;\frac{4}{7}\end{array} $

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