18. (4 points) A student is required to work exactly 6 problems from a 10-problem exam and must work exactly 3 of the fi
Posted: Sun Jul 10, 2022 10:51 am
18. (4 points) A student is required to work exactly 6 problems from a 10-problem exam and must work exactly 3 of the first 4 problems. In how many ways can the six problems be chosen?