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    Question

    The cost price and the marked price of a book have a

    ratio of 5:7. The book is sold at a profit of Rs. 100, and the marked price exceeds the selling price by Rs. 20. Determine the cost price of the book.
    A Rs. 350 Correct Answer Incorrect Answer
    B Rs. 300 Correct Answer Incorrect Answer
    C Rs. 380 Correct Answer Incorrect Answer
    D Rs. 320 Correct Answer Incorrect Answer

    Solution

    Let's assume the cost price and marked price of the book be Rs. 5x and Rs. 7x, respectively Therefore, selling price of the book = Rs. (5x + 100) ATQ; 7x - (5x + 100) = 20 Or, 7x - 5x - 100 = 20 Or, 2x = 120 Or, x = 60 So, cost price of the book = 5x = (5 X 60) = Rs. 300

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