Three years ago, the average age of a family of 5 members was 17 years. A baby…
2026
Three years ago, the average age of a family of 5 members was 17 years. A baby was born, but the average age of the family is still the same today. The present age of the baby is :
- A.
3 years
- B.
4 years
- C.
2 years
- D.
5 years
Attempted by 12 students.
Show answer & explanation
Correct answer: C
Three years ago, the total age of 5 members was 5 × 17 = 85 years.
Now, the total age of these 5 members is 85 + (5 × 3) = 100 years.
With the baby, there are 6 members. The average age is still 17 years.
Total age of 6 members = 6 × 17 = 102 years.
Age of the baby = 102 - 100 = 2 years.