Sum of the ages of 3 children born at interval of 5 years is 30 years. What is the age of the youngest child?
Show answer & explanation
Correct answer: A
Explanation
Let
The age of the youngest child = x
The ages of the other children will be:
Second = x + 5
Third = x + 10
Total age:
x + (x + 5) + (x + 10) = 30
3x + 15 = 30
3x = 15
x = 5
Correct Answer = (A) 5 years