Dec 2

I know a family with four sons. What is the probability of that occurring by chance?

If they have another child, what is the probability that it, too, will be a boy?

Each child has a 50% chance of being a boy, and the sexes of the four children are independent genetic events. So, the combined probability is 1/2 x 1/2 x 1/2 x 1/2 = 1/16.

The next child still has a 50% chance of being a boy.