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    Question

    A shopkeeper buys 60 books and recovers the cost price

    after selling 40 of them. He sells the remaining 20 books at a profit of 25% and earns Rs. 300 as profit on them. What is the total selling price of the 60 books?
    A Rs.4450 Correct Answer Incorrect Answer
    B Rs.5100 Correct Answer Incorrect Answer
    C Rs.4080 Correct Answer Incorrect Answer
    D Rs.3350 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the cost price per book be Rs. x.
    Total CP = 60x.
    SP of 40 books = 60x.
    Profit on remaining 20 books = 25%.
    So, 20x × 0.25 = 300
    5x = 300 ⇒ x = Rs. 60
    Total SP = 60x + 1.25 × 20x
    = 60 × 60 + 1.25 × 20 × 60
    = 3,600 + 1,500 = Rs. 5,100

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