In a box of 8 pens, a total of 2 are defective. If a customer buys 2 pens selected at random from the box, what is the probability that neither pen will be defective?	Select
A) 6 / 11  B) 8 / 15  C) 9 / 20  D) 11 / 25  E) 15 / 28

Rationale: "p ( neither pen is defective ) = 6 / 8 * 5 / 7 = 15 / 28 the answer is e ."
Answer: E