Exams › SSC CGL (Prelims) › Maths

Three years ago, a family of 5 members had an average age of 17 years. A baby has since been born, yet the family's average age today is still 17 years. How old is the baby now?

1. 1 year
2. 2 years
3. 3 years
4. 1.5 years

Correct answer: 2 years

Solution

Three years ago the 5 members totalled 85 years, so today they total 100 years. With the baby, 6 members average 17, totalling 102 years, leaving the baby 2 years old.

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