Rafael is taking a test that contains a section of 12 true-false questions. How many of the possible groups of answers to these questions have exactly 8 correct answers of false?

Choose which 8 of the 12 questions have false answers; the other 4 will be true. The number of groups is the combination C(12, 8) = 12!/(8!4!) = 495. So the correct choice is b, 495.

AI-written and checked against the verified answer.