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      Question

      X and Y are two numbers. Their average is 315, and the

      sum of X and Y is 180% of X. What percentage of X is the difference between X and Y?
      A 22% Correct Answer Incorrect Answer
      B 20% Correct Answer Incorrect Answer
      C 29% Correct Answer Incorrect Answer
      D 18% Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ;

      Since X + Y = 180% of X

      So, X : Y = 5 : 4

      (X − Y) : X = 1 : 5

      Therefore,

      1/5 × 100% = 20%

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