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SSC MTS 2021 · PYQ · Ratio and Proportion · medium

What number must be subtracted from each of the numbers 55, 23, 43 and 19, so that the new values are in proportion?

  1. A.7✓ Correct
  2. B.5
  3. C.9
  4. D.11

Explanation

Let the number be x. (55-x)/(23-x) = (43-x)/(19-x). Cross-multiplying and solving gives x = 7. Check: 48/16 = 36/12 = 3. Correct.
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