Task: Question Answering
Input (English): Problem: in a box of 9 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 ?
Options: a. 3 / 10, b. 4 / 11, c. 5 / 12, d. 6 / 13, e. 7 / 15
Output (English): c