Griffin has a bag of marbles that contains 6 black marbles and 6 red marbles. If he removes 3 marbles at random without replacing any of the marbles, what is the probability that all 3 marbles selected will be red?
Choose the correct answer:  A) 1/11  B) 2/33  C) 3/44  D) 4/55  E) 5/66
P(3 red marbles) = 6/12*5/11*4/10 = 1/11   The answer is 1/11.
<result>A</result>
Griffin has a bag of marbles that contains 6 black marbles and 6 red marbles. If he removes 3 marbles at random without replacing any of the marbles, what is the probability that all 3 marbles selected will be red?