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3 years ago the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is the same today. The present age of the baby is
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- 1 year
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1 1 years 2
- 2 years
- 3 years
- 1 year
Correct Option: C
Given , Five years ago, average age of five members = 17 years
Five years ago, total age of five members = 17 × 5 = 85 years
Sum of their present ages = 85 + 3 × 5 = 100 years
Born on new baby , average age of 6 members = 17 years
Sum of present ages of 6 members = 17 × 6 = 102 years
∴ Present age of baby = 102 – 100 = 2 years
