MCQOPTIONS
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| 1. |
The proportion of the number of students in three classes is 1 : 2 : 3. If 20 students are included in each class, then the proportion becomes 3 : 5 : 7. What was initially the total number of students in the three classes? |
| A. | 240 |
| B. | 220 |
| C. | 200 |
| D. | 280 |
| Answer» B. 220 | |