The sum of the ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the elder child among 5 children?

The sum of the ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the elder child among 5 children?

A 21

B 15

C 16

D 18

Solution

Correct Answer: Option C

X+x+3+x+6+x+9+x+12 = 50
5x+30 =50
X = 50-30/5 = 20/5 =4
4+12 = 16