Question 963322
If you know one of the children is a girl, then the potential other outcomes for children is,
BB
BG
GB
GG
So then,
{{{P(GGG)=1/4}}}
.
.
.
or by using conditional probability,
P(B|A)=P(A_and_B)/P(A)
{{{P=(1/8)/(1/2)=1/4}}}