Answer:
Option B is the correct answer.
Step-by-step explanation:
Expected value of female children= Probability of female children x Total number of children.
A child can be male or female, so there are 2 combinations, favorable outcome is female.
Probability of female children [tex]=\frac{1}{2}[/tex]
Expected value of female children [tex]=\frac{1}{2}\times 3=1.5[/tex]
Option B is the correct answer.