1. The family Many couples want to have both a boy and a girl. If they decide to continue to have children until they have one child of each sex, what would the average family size be? Assume that...

1. The family Many couples want to have both a boy and a girl. If they decide to continue to have children until they have one child of each sex, what would the average family size be? Assume that boys and girls are equally likely.

2. A bigger family Suppose a couple will continue having children until they have at least two children of each sex (two boys and two girls). How many children might they expect to have?