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.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 Ă— 14 = 630 years
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