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Q:

The number of mainas and parrots in an aviary is in the ratio of (4x + 5) : 4x. If 25 mainas and 10 parrots are added to the aviary, then, the ratio would change to 5: 3. How many mainas are there in the aviary at initial?

  • 1
    20
  • 2
    30
  • 3
    35
  • 4
    25
  • 5
    None of these
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Answer : 4. "25"

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