A basket contains 3 blue, 3 red and 3 yellow marbles. If 3 marbles are extracted from the basket at random, what is the probability that a marble of each color is among the extracted?
Select:  A) 2/21  B) 3/25  C) 1/6  D) 9/28  E) 11/24
Probability of getting each color marble = (3C1*3C1*3C1)/9C3   = (3*3*3)/84   = 27/84 = 9/28   So answer is 9/28
<result>D</result>
A basket contains 3 blue, 3 red and 3 yellow marbles. If 3 marbles are extracted from the basket at random, what is the probability that a marble of each color is among the extracted?