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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 remains the same today. The age of the baby today is
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- 3 years
- 2 years
- 1 year
- 1.5 years
- 3 years
Correct Option: B
Three years ago , the average age of 5 members = 17 years.
Total age of 5 member family 3 years ago = 17 × 5 = 85 years
Their total present age = 85 + 3 × 5 = 100 years
Born on new baby , the average age of 6 members remain same . i.e. 17 years
Total present age of 6 members = 17 × 6 = 102 years
∴ Present age of child = Total present age of 6 members - Total present age of 5 members
Hence , Present age of child = 102 – 100 = 2 years
