If the average of 5 consecutive integers is 15 then what is the difference between least and the greatest of the 5 integers?

A 4

B 5

C 8

D 10

E None of these

Correct Answer: Option A

The average of five consecutive numbers is 15.

Middle number = 15

Thus,

the consecutive numbers are = 13, 14, 15, 16, 17

Thus,

highest number = 17

least number = 13

The difference between the least and the greatest number = 17 - 13 = 4