In a box of 11 pens, a total of 3 are defective. If a customer buys 2 pens selected at random from the box, what is the probability that neither pen will be defective?
Answers.
A) 28 / 55
B) 19 / 33
C) 7 / 11
D) 4 / 7
E) 3 / 5

Rationale: "p ( neither pen is defective ) = 8 / 11 * 7 / 10 = 28 / 55 the answer is a ."
Answer: A