In a box of 12 pens a total of 3 pens are defective. If a customer buys 2 pens at random from box, what is the probability that exactly 1 pen will be defective?
(A) 6/11
(B) 9/44
(C) 9/22
(D) 3/4
(E) 9/16
Answer (Posted on Dec 10th): C
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