Question

The average of 18 , 32 , x and 40 is 27 . The value of x is

a) 22
b) 18
c) 23
d) 43

Answer 1

Answer:

18

Step-by-step explanation:

Average =  (18 + 32 + X + 40) / 4 = 27

(90 + X) / 4 = 27

90 + X = 4 * 27

90 + X = 108

X = 108 -90

X = 18