Question

gerry is buying a cellphone, a set of earphones, and a phone case. there are 5 types of phones he can choose from. in addition, there are 6 types of earphones and 7 types of phone cases he can buy. how many possible ways can he buy from the selection of phones, earphones, and phone cases?

Explanation:

Step1: Apply multiplication principle

The number of ways to choose a phone is 5, the number of ways to choose ear - phones is 6, and the number of ways to choose a phone case is 7.

Step2: Calculate total ways

$5\times6\times7 = 210$

Answer:

210