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Three 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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- 2 years
- 2.4 years
- 3 years
- 1.5 years
- 2 years
Correct Option: A
Here , Three years ago, the average age of 5 members = 17 years.
Total age of the family 3 years ago = 5 × 17 = 85 years
Total present age of the family = 85 + 15 = 100 years
Let the child’s present age be y years.
According to the question,
100 + y = 17 × 6 = 102
⇒ y = 102 – 100 = 2 years
Hence , the child’s present age is 2 years.
