Question

What is the value of x, if the average of 36, 40, x and 50 is 45?​

Answer 1

Explanation:

Find the average of the four numbers like this :

(36 + 40 + x + 50) / 4 = 45 Multiply both sides by '4'

36 + 40 + x + 50 = 180

x = 180 - 36 - 40 - 50

x = 54