### Home > A2C > Chapter 11 > Lesson 11.2.1 > Problem 11-42

11-42.

Your midterm exam contains 12 questions and you must answer any 10. Homework Help ✎

How many different combinations of questions are possible?

If everyone must answer questions one, two and three, how many different combinations are possible?

_{12}*C*_{10} = 66

_{9}*C*_{7} = 36