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      Question

      The average of two numbers ‘P’ and ‘Q’ is 480

      such that they are in the ratio 5:7 respectively. Another number ‘R’ is 60 more than ‘Q’ and fourth number ‘S’ is 50% of the ‘P’. Find the average of ‘R’ and ‘S’.
      A 390 Correct Answer Incorrect Answer
      B 400 Correct Answer Incorrect Answer
      C 410 Correct Answer Incorrect Answer
      D 420 Correct Answer Incorrect Answer

      Solution

      Sum of ‘P’ and ‘Q’ = 480 × 2 = 960
      Therefore,
      ‘P’ = 960 × (5/12) = 400
      ‘Q’ = 960 – 400 = 560
      ‘R’ = 560 + 60 = 620
      ‘S’ = 0.5 × 400 = 200
      Required average = {(620 + 200)/2} = 410

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