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    By selling 200 pens, a shopkeeper gains the selling price of 40 pens. Find the gain percentage.
    Question

    By selling 200 pens, a shopkeeper gains the selling price of 40 pens. Find the gain percentage.

    A.

    25%

    B.

    30%

    C.

    35%

    D.

    20%

    Correct option is A

    Given:

    Gain of selling price of 40 pens by selling 200 pens

    Formula Used:

    Profit = SP - CP

    Profit percentage =ProfitCP×100 \frac{Profit}{CP} \times 100​​

    Solution:

    Here let the selling price of one pen be ₹1

    Then selling price of 200 pen = ₹200

    Profit = selling price of 40 pens = ₹40

    Cost Price = SP - Profit = 200 - 40 = 160

    Profit percentage =40160×100=25% \frac{40}{160} \times 100 = 25\%​​

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