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      Question

      The earnings of โ€˜Xโ€™, โ€˜Yโ€™, and โ€˜Zโ€™ 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 โ€˜Xโ€™ and โ€˜Yโ€™ spend 30% and 40% of their respective earnings, then what amount does โ€˜Zโ€™ 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 โ€˜Xโ€™, โ€˜Yโ€™, and โ€˜Zโ€™ = 9500 ร— 3 = Rs. 28,500 Earning of โ€˜Xโ€™ = 28500 ร— (6/15) = Rs. 11,400 Earning of โ€˜Yโ€™ = 28500 ร— (2/15) = Rs. 3,800 Earning of โ€˜Zโ€™ = 28500 ร— (7/15) = Rs. 13,300 Sum of expenditures of all three = 3000 ร— 3 = Rs. 9,000 Spending of โ€˜Xโ€™ = 11400 ร— 0.30 = Rs. 3,420 Spending of โ€˜Yโ€™ = 3800 ร— 0.40 = Rs. 1,520 So, spending of โ€˜Zโ€™ = 9000 โ€“ 3420 โ€“ 1520 = Rs. 4,060

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