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 was thereby lowered by 1 month, the age of newcomer is-

There were 24 students in a class. One of them, who was 18 years old,

1.	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 was thereby lowered by 1 month, the age of newcomer is-
A.	14 years
B.	15 years
C.	16 years
D.	17 years
Answer» D. 17 years