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    Question

    Kabir bought a TV for Rs. 2800 and spent some money on

    installation. He marked it up by 25%, gave a Rs. 320 discount, and earned a 15% profit. Find the installation cost.
    A Rs 480 Correct Answer Incorrect Answer
    B Rs 320 Correct Answer Incorrect Answer
    C Rs 400 Correct Answer Incorrect Answer
    D Rs 360 Correct Answer Incorrect Answer

    Solution

    Let installation cost = Rs. x
    Effective cost = 2800 + x
    Marked Price = 1.25(2800 + x)
    Selling Price = Marked – 320 = 1.15(2800 + x)
    1.25(2800 + x) – 1.15(2800 + x) = 320
    0.10(2800 + x) = 320
    2800 + x = 3200
    x = Rs. 400

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