Question

The average of five numbers is 56. If the average of first four numbers is 54, what is the value of the fifth number?

• A. 68
• B. 72
• C. 56
• D. 64
• E. None of these

Answer 1

The correct option is D 64

Here, total sum of five numbers = 56 $\times$ 5 = 280
Sum of first four numbers = 4 $\times$ 54
= 216
$\therefore$ Value of fifth number = 280 - 216
= 64