# Thread: Probability of 0ne boy

1. ## Probability of 0ne boy

A researcher is studying the number of boys and girls in families with three children. The birth of a boy or girl is equally likely. Find the probability that a family of three children has one boy?

I think that the answer is 1/8

I need to take each percent and multiply them together?

(.5)(.5)(.5) to get 1/8

2. Originally Posted by IDontunderstand
A researcher is studying the number of boys and girls in families with three children. The birth of a boy or girl is equally likely. Find the probability that a family of three children has one boy?
I think that the answer is 1/8
I need to take each percent and multiply them together?
(.5)(.5)(.5) to get 1/8
Here is the outcome space.
$\begin{array}{ccc}
B & B & B \\
B & B & G \\
B & G & B \\
B & G & G \\
G & B & B \\
G & B & G \\
G & G & B \\
G & G & G \\ \end{array}$

You count the cases with one boy.