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1. |
In a school, the total number of students was 160 in the year 2015. In the following year, the number of girls decreased by 20 and the number of boys increased by 20. As a result, the number of boys became 7 times the number of girls. During 2015, the number of boys was how much more than the number of girls? |
A. | 100 |
B. | 90 |
C. | 80 |
D. | 70 |
Answer» D. 70 | |