pyq/2017/csat/56

A bag contains 20 balls: 8 balls are green, 7 are white, and 5 are red. What is the minimum number of balls that must be picked up from the bag blindfolded (without replacing any of them) to be assured of picking at least one ball of each color?

(A) 17

(B) 16

(C) 3

(D) 11