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    Question

    Salaries of M, N and O are in the proportion 4:6:5. Their

    average salary is Rs. 18,000. If M spends 50% of salary, N spends 60%, and O spends 70%, find their average spending.
    A Rs. 12,050 Correct Answer Incorrect Answer
    B Rs. 16,200 Correct Answer Incorrect Answer
    C Rs. 10,920 Correct Answer Incorrect Answer
    D Rs. 11,025 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Total salary = 18000 × 3 = Rs. 54,000

    M’s salary = 54000 × (4/15) = Rs. 14,400

    N’s salary = 54000 × (6/15) = Rs. 21,600

    O’s salary = 54000 × (5/15) = Rs. 18,000

    M’s expense = 14400 × 0.5 = Rs. 7,200

    N’s expense = 21600 × 0.6 = Rs. 12,960

    O’s expense = 18000 × 0.7 = Rs. 12,600

    Average expenditure = (7200 + 12960 + 12600) ÷ 3 = Rs. 10,920

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