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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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