A family plans to have 3 children. For each birth, assume that the probability of a boy is the same as the probability of a girl. What is the

A family plans to have 3 children. For each birth, assume that the probability of a boy is the same as the probability of a girl.

What is the probability that they will have exactly one girl?

  0.5

  0.125

  0.375

  0.875

  none of these