Question

A video store is running a closeout special of 5 DVDs for $15. If the store has 42 different titles in the closeout section, how many different

combinations of 5 DVDs can be purchased?

Answer 1

C. 850,668

Explanation:

Since order doesn't matter, we use the combination equation: nCr

We first need to find n, which would be 42. Then we find r, which is 5.

We plug them into either the equation or a calculator

(42!)/(5!(42-5)!) = 850,668