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1. |
Average age of 5 boys is 16 yr,of which that of 4 boys is 16 yr, 3 months. The age of the 5th boys. |
A. | 15yr |
B. | 15yr 6 months |
C. | 15 yr 4 months |
D. | 15 year 2 months |
Answer» B. 15yr 6 months | |