Question

Bob is going to China, and he wants to bring some DVDs on the airplane. If Bob has a collection of 15 DVDs, in how many ways can he bring 3 of them?

Answer 1

There would be "five ways" to bring three DVD's. If you divide fifteen by three there would be five. 

$15/3=5$

To prove your work:

$3 * 5 = 15$

Hope this helps!