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      Question

      A shopkeeper has two varieties of mobile phones. Variety

      X costs Rs. 8,000 each and Variety Y costs Rs. 12,000 each. He wants to mix them so that the average cost of a phone in the mixture becomes Rs. 10,500. In what ratio should he mix Variety X and Variety Y?
      A 3:5 Correct Answer Incorrect Answer
      B 2:7 Correct Answer Incorrect Answer
      C 4:5 Correct Answer Incorrect Answer
      D 1:7 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Cheaper (X) = 8,000 Dearer (Y) = 12,000 Mean price = 10,500 Ratio X : Y = (12,000 − 10,500) : (10,500 − 8,000) = 1,500 : 2,500 = 3 : 5

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