Question

Assuming boys and girls are equally​ likely, find the probability of a couple having a baby boy boy when their fourth fourth child is​ born, given that the first three three children were all boys all boys.

Answer 1

I am assuming the gender of each child is independent of the other.

Then the information about the first three children is irrelevant.

So then the probability of fourth child being boy is 1/2, since boys and girls are equally​ likely.

Hope this helps.