Question

If the average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number?

A. ZY - V
B. Z/V - 3 - Y
C. Z/3 - V - Y
D. 3V- Z - Y
E. V- Z - Y

Answer is D. How so?

Answer 1

You see average is calculated by the formula: Sum of quantities/No of quantities.
So, (Z+Y+ ?)/3=V
Thus, 3V= Z+Y+?
3V-Z-Y=?
(? signifies the unknown number)

Answer 2

Thank You

Answer 3

yw.