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1. |
In a class, there are 20 boys whose average age is decreased by 2 months, when one boy aged 18 years is replaced by a new boy.Find the age of new boy. |
A. | 11 years 10 months |
B. | 12 years 2 months |
C. | 13 years 6 months |
D. | 14 years 8 months |
Answer» E. | |