Question

The average of 7.5, 3.2, 11.3, 20.5 and x is 10. Find the value of x.

(a)5.5
(b)4
(c)6.5
(d)7.5​

Answer 1

(7.5+3.2+11.3+20.5+x)/5=10
42.5+x=50
x=7.5

Answer 2

Answer:

7.5

Step-by-step explanation:

[ 7.5 + 3.2 + 11.3 + 20.5 + x ] / 5 = 10

[ 42.5 + x ] / 5 = 10

42.5 + x = 10 X 5

x = 50 - 42.5

x = 7.5