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    Question

    B invests 20% of his monthly salary on Travelling and

    20% of remaining on Food. Again, he invested 25% of the remaining (after travelling and food expenses) on Rent. If he invested Rs. 4,800 on Rent and Food, then find his monthly salary.
    A 12000 Correct Answer Incorrect Answer
    B 18000 Correct Answer Incorrect Answer
    C 15000 Correct Answer Incorrect Answer
    D 10000 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let monthly salary of B = 100x Amount invested on Travelling = (20/100) × 100x = 20x Remaining amount = 100x – 20x = 80x Amount invested on Food = (20/100) × 80x = 16x Remaining amount = 80x – 16x = 64x Amount invested on Rent = (25/100) × 64x = 16x ATQ, => (16x + 16x) = 4800 => x = 150 Therefore monthly salary of B = 100 × 150 = Rs. 15,000

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