A box contains 12 items, 4 of which are defective. If 3 items are drawn at random, what is the probability that exactly 2 are defective?
Q1. A box contains 12 items, 4 of which are defective. If 3 items are drawn at random, what is the probability that exactly 2 are defective?
Answer: 12/55
Explanation: The probability of drawing exactly 2 defective items is (4C2 * 8C1) / 12C3 = (6 * 8) / 220 = 48/220 = 12/55.