In a family with three children, find the mean of the number of children who will be girls if the probability mass function is given below (where X is the random variable for the number of children who are girls): X 2 3 0 P(X=x) 1/4 1 1/3 1/4 1/6 Select one: O 4/3 O 1 00 O 1/2 O 2/3 OOO

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