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    Question

    Karan spent 20% and 15% of his monthly salary on food

    and bills respectively. Out of the remaining amount, he spent 20% and 30% on entertainment and books, respectively. Now he gave 50% of the remaining amount to his sister and left with Rs. 8,125. Find the amount spent by Karan on books.
    A Rs. 9,750 Correct Answer Incorrect Answer
    B Rs. 10,500 Correct Answer Incorrect Answer
    C Rs. 11,250 Correct Answer Incorrect Answer
    D Rs. 12,000 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the monthly salary of Karan = Rs. 100x Amount spent by Karan on food and bills together = 20x + 15x = Rs. 35x Amount spent by Karan on entertainment and books together = 0.50 × (100x – 35x) = Rs. 32.5x Amount given to sister = 0.50 × (100x – 35x – 32.5x) = Rs. 16.25x So amount left with him = 0.50 × (100x – 35x – 32.5x) = 8125 16.25x = 8125 x = 500 So the amount spent by Karan on books = 0.30 × 65 × 500 = Rs. 9,750

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