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      Question

      The marked price of the washing machine is 30% above its

      cost price. The seller offers two successive discounts of 20% and 10%, respectively. If he incurs a loss of Rs. 640, find the price (in rupees) at which he sold the washing machine.
      A Rs. 9450 Correct Answer Incorrect Answer
      B Rs. 9360 Correct Answer Incorrect Answer
      C Rs. 8160 Correct Answer Incorrect Answer
      D Rs. 7860 Correct Answer Incorrect Answer

      Solution

      Let the cost price = Rs. x
      Marked price = 130% of x = Rs. 1.30x

      According to the question,
      x - 1.30x Ă— 80% Ă— 90% = 640
      x - 1.30x Ă— 0.80 Ă— 0.90 = 640
      x - 0.936x = 640
      0.064x = 640 âźą x = 10000

      The required selling price = Rs. 10000 - 640 = Rs. 9360

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