### Home > CCA2 > Chapter 10 > Lesson 10.1.3 > Problem10-52

10-52.

Your midterm exam contains $12$ questions and you must answer any $10$.

1. How many different combinations of questions are possible?

$_{12}C_{10} = 66$

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

$_9C_7 = 36$