Math Is Fun Forum

juantheron

Member

Registered: 2011-10-19

Posts: 312

another probability

A family has two children. Assume that birth month is independent of gender,
with boys and girls equally likely and all months equally likely, and assume that the
elder child’s characteristics are independent of the younger child’s characteristics).

What is the probability that both are girls, given that at least one is a girl who was
born in March.