Q140
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-
A.
14 years
B.
15 years
C.
16 years
AnswerD.
17 years
Answer: Option C
Solution
Answer: Option C
Solution:
Total age decreased = (24 × 1) months
= 24 months
= 2 years
∴ Age of the newcomer
= (18 - 2) years
= 16 years