Griffin has a bag of marbles that contains 7 black marbles and 5 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 black? Select:
A) 4/15 B) 5/22 C) 6/35 D) 7/44 E) 8/55
P(3 black marbles) = 7/12*6/11*5/10 = 7/44   The answer is 7/44.
<result>D</result>
Griffin has a bag of marbles that contains 7 black marbles and 5 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 black?