Question

A test is administered with 15 questions. Students are allowed to answer any ten. How many different choices of ten questions are there?

150
250
3000
3003

Answer 1

3003

Explanation:

This is a combination since the order doesn't matter

15 C 10

The formula

15!

-------

10! (15-10)!

15*14*13*12*11

--------------------

5*4*3*2*1

3003