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1. |
The students in three classes are in the ratio 2 : 3 : 5. If 20 students are increased in eachclass, the ratio changes to 4 : 5 : 7. Originally the total number of students was : |
A. | 50 |
B. | 90 |
C. | 100 |
D. | 150 |
Answer» D. 150 | |