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    Question

    The collective income of 'D', 'E', and 'F' is Rs. 15000.

    They spend 55%, 60%, and 50% of their incomes respectively, and their savings are in the ratio 3:4:9. What is the total expenditure of 'D', 'E', and 'F'?
    A Rs.1842 Correct Answer Incorrect Answer
    B Rs.1452 Correct Answer Incorrect Answer
    C Rs.8077 Correct Answer Incorrect Answer
    D Rs.1835 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let the incomes of โ€˜Dโ€™, โ€˜Eโ€™, and โ€˜Fโ€™ be Rs. d, Rs. e, and Rs. f. According to the question, 0.45d : 0.4e : 0.5f = 3 : 4 : 9 Or, d : e : f = (3/0.45) : (4/0.4) : (9/0.5) = 6.67 : 10 : 18 Sum of the ratios = 6.67 + 10 + 18 = 34.67 Therefore, income of โ€˜Dโ€™ = 15000 ร— (6.67/34.67) = Rs. 2886 Income of โ€˜Eโ€™ = 15000 ร— (10/34.67) = Rs. 4327 Income of โ€˜Fโ€™ = 15000 - (2886 + 4327) = Rs. 7787 Required sum = (0.55 ร— 2886) + (0.6 ร— 4327) + (0.5 ร— 7787) = 1587 + 2596 + 3894 = Rs. 8077

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