Question

The average of 4 numbers is 10. If each of the numbers is increased by 8,

what is the average of the 4 new numbers?

Answer 1

New Average = 14

Explanation:

Average = 10

let the 4 numbers be : a, b, c, d

(a + b + c + d)/4 = 10

((a+4) + (b+4) + (c+4) + (d+ 4) )/4 = New Average

(a + b + c + d + 16)/4 = New Average

(a + b + c + d)/4 + 16/4 = New Average

10 + 16/4 = New Average

10 + 4 = New Average

New Average = 14