The average of 8, 11 and x is what is the value of x?

The average of 8, 11 and x is what is the value of x?

A 17

B 15

C 10

D 13

Solution

Correct Answer: Option A

(8+11+x)/3 = 12

or, 8+11+x = 36

or, x = 36 - 8 - 11

or, x = 17