Answer:
Correct choice is b.
Step-by-step explanation:
Rafael is taking a test that contains a section of 12 true-false questions. Exactly 8 correct answers of false from 12 true-false questions have
[tex]C_{8}^{12}=\dfrac{12!}{8!(12-8)!}=\dfrac{12!}{8!\cdot 4!}=\dfrac{8!\cdot 9\cdot 10\cdot 11\cdot 12}{8!\cdot 1\cdot 2\cdot 3\cdot 4}=9\cdot 5\cdot 11=495[/tex]
possible groups.
