There are 20 children in the cast of a class play, and 8 of the children are boys. Of the boys, 4 have a...

15. 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 play, 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
16. The variables x and y are directly proportional, and y = 4 when x = 9. What is the value of y when x = 18?
A. 4
B. 8
C. 6
D. 2