A baby is added to a hospital nursery. Before the baby was added there were two boys in the nursery and an uncounted number of girls. After the new baby is added a baby is selected at random among all the babies. The selected baby is a boy.

What is the probability that the added baby was a girl?

(In reply to re(3): I have not read Charlie's post yet by SilverKnight)

I understand, I don't object, I get it.
I'm on board, I support and fully agree with the solution by Charlie.
Thanks for your help.

Posted by FatBoy on 2003-10-09 12:36:20