There are 14 slate rocks, 20 pumice rocks, and 10 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?  Choices:  A) 1 / 5  B) 11 / 22  C) 81 / 724  D) 91 / 946  E) 101 / 987

Rationale: "14 / 44 * 13 / 43 = 91 / 946 the answer is d ."
Answer: D