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      Question

      What must be added to each term of the ratio 3:7 so that

      it may equal to 4:5?
      A 16 Correct Answer Incorrect Answer
      B 23 Correct Answer Incorrect Answer
      C 5 Correct Answer Incorrect Answer
      D 13 Correct Answer Incorrect Answer

      Solution

      Let's the added number be x. => (3 + x)/(7 + x) = 4/5 =>Β 15 + 5x = 28 + 4x => x = 13

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