Question

In a family of three children, find the probability of having at least two boys.

Answer 1

There are three children in family.

So, the total number of outcomes = 2³ = 8

The number of favourable cases:

Atleast two of them are boys means all those cases in which we have either 2 or 3 boys.)

The eight combinations are BBB, BBG, BGB, BGG, GBB, GBG, GGB, GGG.

The probability of having at least two boys

= `4/8`

= `1/2`