A certain bag contains 100 balls â€” 50 white, 30 green, 8 yellow, 9 red, and 3 purple. If a ball is to be chosen at random, what is the probability that the ball will be neither red nor purple?  Choose one:
A) 0.9
B) 0.75
C) 0.6
D) 0.88
E) 0.5

Rationale: "according to the stem the ball can be white , green or yellow , so the probability is ( white + green + yellow ) / ( total ) = ( 50 + 30 + 8 ) / 100 = 88 / 100 = 0.88 . answer is d"
Answer: D