How many boys and girls?
A family has three children. The first is a girl. You know at least one of the remaining two is a boy. Assuming there is a 50/50 probability of birthing boys versus girls provide the probability that the family has:
1. 1 boy, 2 girls
There is a subtle error in the phrasing of the puzzle.
As a result the answer is not well determined. What
is the error?
This page was last updated July 1, 2004.