There were 24 students in a class. One of them, who was

Home » Aptitude » Average » Question

There were 24 students in a class. One of them, who was 18 years old, left the class and his place was filled up by a newcomer. If the average of the class thereby, was lowered by one month, the age of the newcomer is

1. 14 years
2. 15 years
3. 16 years
4. 17 years

Correct Option: C

Here , Age of replaced student = 18 years
Total age decrease = 24 × 1 = 24 months = 2 years
∴ Age of newcomer = Age of replaced student - Total age decrease
Hence , Age of newcomer = 18 – 2 = 16 years.