Question

Genevieve is buying a car audio system that consists of a stereo, speakers, and amplifiers. She is choosing between 5 types of stereos and 2 types of amplifiers. If she has a total of 30 choices, how many types of speakers must there be?

3
6
10
20

Answer 1

3

Explanation:

(A)

Answer 2

3 because 2 times 5=10 and 30 divided by 10=3