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      Question

      The reduction in price from marked price to selling price

      is 28% of the gap between the marked price and cost price. If the seller gains 18% profit and the marked price is Rs. 780, determine the cost price.
      A 350 Correct Answer Incorrect Answer
      B 420 Correct Answer Incorrect Answer
      C 624 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— 1.18 = Rs. 118x

      ATQ,

      (780 - 118x) = (780 - 100x) Γ— 0.28

      β‡’ 780 - 118x = 218.4 - 28x

      β‡’ 780 - 218.4 = 118x - 28x

      β‡’ 561.6 = 90x

      β‡’ x = 6.24

      Cost price = 100 Γ— 6.24 = Rs. 624

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