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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 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
Correct Option: C
Given that , 3 years ago, the average age of 5 members = 17 years.
Total present age of 5 members = 17 × 5 + 3 × 5
Born on new baby , the average age of 6 members = 17 years.
Total present age of 6 members = 17 × 6
Present age of child = 17 × 6 – (17 × 5 + 3 × 5)
Present age of child = 102 – (85 + 15)
∴ Present age of child = 102 – 100 = 2 years
