7 Jul
2010
7 Jul
'10
5:51 p.m.
On Thursday 08 July 2010 00:30:52 Mike Speciner wrote:
Since boys and girls are equally likely, it takes on average two tries to get a boy, and it's given that for each family, exactly one child is a boy. So half the kids are girls.
Yup. Or, more simply: whenever the parents decide to stop having children, each child is independently a boy with probability 1/2 and the parents' decisions aren't going to change that. -- g