Answer
Let B represents a boy and G represents a Girl, then sample space for three children will be:
{BBB, BBG, BGB, GBG, GGB, GBB, GGB, GGG}
Probability of no boy = {GGG} = 1/8
P(at least 1 boy) = 1 - P(No boy)
= 1 - 1/8
= 7/8
Work Step by Step
As given in answer
