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Recently married, a young couple plans to continue having children until they have their first girl. a) what is the couple expected family size. Assume

Recently married, a young couple plans to continue having children until they have their first girl.

a) what is the couple expected family size. Assume that the probability of having a girl is 1/2 and the outcome of each birth is an independent random event.

b) what is the probability that they have two boys before they have the girl?

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