Suppose that a family has five children, consisting of three girls and two boys. Call the girls Abigail, Brianna, and Courtney; call the boys Duane and Evan. Suppose further that two of these children are to be selected at random.
-Determine the expected value of the number of girls who will be selected.

Question

Quizplus · Accepted Answer

The Answer is To determine the expected value for the number of girls, you see there is a 3 probability of 2 girls being selected, a . 6 probability of 1 girl being selected, and a . 1 probability of no girls being selected. So, the expected value is

2(.3)+1(.6)+0(.1)=1.2

girls.

Suppose That a Family Has Five Children, Consisting of Three