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
Options:
A . 15 years
B . 14 years
C . 17 years
D . 16 years
Answer: Option D Answer: (d)Total age decrease = 24 × 1 = 24 months = 2 years ∴ Age of newcomer = 18 – 2 = 16 years.
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