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    Question

    The earnings of β€˜X’, β€˜Y’, and β€˜Z’ are in the

    ratio 6:2:7 respectively. The average earning of the three friends is Rs. 9,500. If the average spending of the three together is Rs. 3,000 and β€˜X’ and β€˜Y’ spend 30% and 40% of their respective earnings, then what amount does β€˜Z’ spend?
    A Rs.2,160 Correct Answer Incorrect Answer
    B Rs.4,560 Correct Answer Incorrect Answer
    C Rs.4,060 Correct Answer Incorrect Answer
    D Rs.5,000 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Sum of earnings of β€˜X’, β€˜Y’, and β€˜Z’ = 9500 Γ— 3 = Rs. 28,500 Earning of β€˜X’ = 28500 Γ— (6/15) = Rs. 11,400 Earning of β€˜Y’ = 28500 Γ— (2/15) = Rs. 3,800 Earning of β€˜Z’ = 28500 Γ— (7/15) = Rs. 13,300 Sum of expenditures of all three = 3000 Γ— 3 = Rs. 9,000 Spending of β€˜X’ = 11400 Γ— 0.30 = Rs. 3,420 Spending of β€˜Y’ = 3800 Γ— 0.40 = Rs. 1,520 So, spending of β€˜Z’ = 9000 – 3420 – 1520 = Rs. 4,060

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