There are 12 slate rocks, 17 pumice rocks, and 8 granite rocks randomly distributed in a certain field. If 2 rocks are chosen at random and without replacement, what is the probability that both rocks will be slate rocks? Answers:  A) 5/36  B) 7/64  C) 9/83  D) 11/111  E) 13/135
12/37*11/36 = 11/111   The answer is 11/111.
<result>D</result>
There are 12 slate rocks, 17 pumice rocks, and 8 granite rocks randomly distributed in a certain field. If 2 rocks are chosen at random and without replacement, what is the probability that both rocks will be slate rocks?