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      Question

      A writer completed an average of 120 pages per week for the

      first 10 weeks. In the next 5 weeks, he completed ‘x’ pages per week, so that his overall average rose to 132 pages per week. Find the value of 'x'.
      A 193 Correct Answer Incorrect Answer
      B 134 Correct Answer Incorrect Answer
      C 156 Correct Answer Incorrect Answer
      D 144 Correct Answer Incorrect Answer

      Solution

      ATQ,

      {120 × 10 + 5 × x}/(10 + 5) = 132

      Or, 5x + 1200 = 132 × 15 = 1980

      Or, 5x = 780

      Or, x = 156

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