And the probability of that is once again one half times one half or one four. And we continue this and in each one of these squares we have a value of one fourth. So we have a girl and a boy here and we have a girl and we have a girl. Okay, so this is basically our opponent square, for example number two. So we want to find the probability of two parents producing two children who are both female. And if we look at the pun and square, the only time we have both females, both girls is in this final square.