Question

You are choosing a CD from your friend’s music collection. You can choose 1 of 4 country CDs, 1 of 3 soul CDs, or 1 of 5 pop CDs. How many ways can you choose a CD?

10
12
48
60

Answer 1

There are 12 ways you can choose a CD.

There are 12 total CDs to choose from, and you can only choose 1, so


`_(12)C_1 = (12!)/(1!11!) = 12`