in a box of 8 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 ?
"p ( neither pen is defective ) = 5 / 8 * 4 / 7 = 5 / 14 the answer is d ."
multiply(divide(subtract(8, 3), 8), divide(subtract(subtract(8, 3), const_1), subtract(8, const_1)))