Question

Assuming that boys and girls are equally likely, find the probability of a couple having a boy when their third child is born, given that the first two children were both girls.

Answer 1

The likelihood of a boy or a girl is stable and equal. In the problem, it says their first 2 children were girls. But this doesn't have an effect on the third child.

So, the third child's possibility to be a boy is 1/2.