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      Question

      The average age of a group of employees is 45 years. When a

      new employee aged 60 joins, the average increases by 1 year. Find the total age of the group before the new employee joined.
      A 630 Correct Answer Incorrect Answer
      B 600 Correct Answer Incorrect Answer
      C 650 Correct Answer Incorrect Answer
      D 620 Correct Answer Incorrect Answer
      E 610 Correct Answer Incorrect Answer

      Solution

      Let the number of employees before joining be 'P'.

      Age before = 45P

      (45P + 60) / (P + 1) = 46
      => 45P + 60 = 46P + 46
      => P = 14

      Total age = 45 × 14 = 630 years

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