[URGENT] in 5 minutes Suppose, in a family the couple wishes to have exactly two female children. The occurrence of male and female births is equally likely. They will have children until this...

[URGENT] in 5 minutes

Suppose, in a family the couple wishes to have exactly two female children. The occurrence of male and female births is equally likely. They will have children until this condition is fulfilled.

How many children does the family expects to have?