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    Question

    Mohit sold 5 pens making a 8% profit on each and another

    15 pens making a 12% profit on each. If the total selling price for all 20 pens was ₹555, what was the cost price of one pen?
    A Rs 25 Correct Answer Incorrect Answer
    B Rs 10 Correct Answer Incorrect Answer
    C Rs 12 Correct Answer Incorrect Answer
    D Rs 18 Correct Answer Incorrect Answer

    Solution

    Let the cost price of a pen = t

    Selling price = ₹555

    [(5 * 108/100) + (15 * 112/100)] of t = ₹555

    (540 + 1680)t = 55500

    2220t = 55500

    t = ₹25

    Hence, the cost price of a pen = ₹25

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