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Suppose that a family has three children, each of which is a boy or a girl, and we assume that boys and girls are equally

Suppose that a family has three children, each of which is a boy or a girl, and we assume that

boys and girls are equally likely at birth.

a. The probability that all three children in the family are girls, if it's known that at least one

child

is a girl, is _________

b. The probability that there are two girls in the family, given that the oldest child is a girl, is

_________

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