Q. 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 (in years) is
✅ Correct Answer: (A)
2
Explanation: Here , Three years ago, the average age of 5 members = 17 years
Three years ago, Total age of the family = 17 × 5 = 85 years
Total age of 5 member family today = 85 + 15 = 100 years
Born on baby , the average age of 6 members = 17 years
Total age of the family with child today = 17 × 6 = 102 years
Age of baby = 102 – 100 = 2 years
Explanation by: Vaibhav Shukla
Here , Three years ago, the average age of 5 members = 17 years
Three years ago, Total age of the family = 17 × 5 = 85 years
Total age of 5 member family today = 85 + 15 = 100 years
Born on baby , the average age of 6 members = 17 years
Total age of the family with child today = 17 × 6 = 102 years
Age of baby = 102 – 100 = 2 years
Three years ago, Total age of the family = 17 × 5 = 85 years
Total age of 5 member family today = 85 + 15 = 100 years
Born on baby , the average age of 6 members = 17 years
Total age of the family with child today = 17 × 6 = 102 years
Age of baby = 102 – 100 = 2 years