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      Question

      A trader gives a discount such that the difference between

      marked price and selling price is 50% of the difference between marked price and cost price. If he earns 30% profit and the marked price is Rs. 960, find the cost price.
      A 350 Correct Answer Incorrect Answer
      B 420 Correct Answer Incorrect Answer
      C 600 Correct Answer Incorrect Answer
      D 580 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the cost price be Rs. 100x

      Selling price = 100x Γ— 1.30 = Rs. 130x

      ATQ,

      (960 - 130x) = (960 - 100x) Γ— 0.50

      β‡’ 960 - 130x = 480 - 50x

      β‡’ 960 - 480 = 130x - 50x

      β‡’ 480 = 80x

      β‡’ x = 6

      Cost price = 100 Γ— 6 = Rs. 600

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