question_answer

The average age of 30 students of a class is 14 years 4 months. After admission of 5 new students in the class the average becomes 13 years 9 months. The youngest one of the five new students is 9 years 11 months old. The average age of the remaining 4 new students is.

A)  11 years 2 months

B)  13 years 6 months

C)  10 years 4 months

D)  12 years 4 months

E)  None of these