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The students in three classes are in the ratio of 2:3:5. If 20 students are increased in each class, the ratio changes to 4:5:7. Originally, the total number of students was ______. | |
A. | 100 [Correct Answer] |
B. | 180 [Wrong Answer] |
C. | 200 [Wrong Answer] |
D. | 400 [Wrong Answer] |