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?

New Average = 14

Step-by-step 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