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Q:

The number of students in three classes are in the ratio 2:3:5. If the number of students in each class is increased by 20 the ratio become 4: 5: 7. The total number of students before the increase was

  • 1
    80
  • 2
    90
  • 3
    100
  • 4
    120
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Answer : 3. "100"

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