There are 20 children in the cast of a class play, and 8 of the children are boys. Of the boys, 4 have a speaking part in the pl
ay, and of the girls, 8 do not have a speaking part in the play. If a child from the cast of the play is chosen at random, what is the probability that the child has a
speaking part?
A: 2/5
B: 1/2
C: 3/5
D: 3/4