Question

What number correctly completes the following probability distribution for the number of boys in a family of 3 children?

3 boys = 0.125
2 boys = 0.375
1 boy = 0.375
0 boys = ?

Answer 1

Answer: 0.125

Explanation:

Add up the probabilities in the other ones and subtract that sum by 1, since 0 boys is out remaining answer