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      Question

      The value of a washing machine depreciates by 10% every

      year. The current price of the washing machine is โ‚น9477. What was the price of the machine three years ago?
      A 11500 Correct Answer Incorrect Answer
      B 12500 Correct Answer Incorrect Answer
      C 13000 Correct Answer Incorrect Answer
      D 14000 Correct Answer Incorrect Answer

      Solution

      Let the price of a washing machine three years ago be Rs. Is. According to Question, X ร— (1-10/100)3 =9477 X ร— (9/10)3 =9477 X ร—729/1000 =9477 X=13000.

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