One person has 2 children. At least one of them was a girl. Then the probability that 2 of the are girl is_____ Choose the correct choice from the following answers.
A) 1/2 B) 1/3 C) 1/4 D) 3/2 E) 5/2
total possibilities are 2 (G,B) (G,G)   probability that of both are girls = 1/2   1/2NSWER:1/2
<result>A</result>
One person has 2 children. At least one of them was a girl. Then the probability that 2 of the are girl is_____