Question

The mean of 5 numbers is 160. The numbers include 150, 140, 162, and 178. What is the 5th number?

Formula is m=a+b+c+d+e/5


Literal equations

Answer 1

170

Explanation:

`m = (a+b+c+d+e)/(5)`

`160 = (150+140+162+178+e)/(5)`

`800 = 630+e`

`e = 800 - 630`

`e = 170`