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There are 30 employees in an office. If the average age of the first 15 employees is half the average age of the rest of the employees. Find the ratio of the average ages of the employees of the two groups after 6 years. The total age of the employees is 1125 years.

Correct Answer: 31 : 56
The total age of the first group is half the total age of the second group. 15x + 15x * 2 = 45x = 1125 X = 25 years The average age of the first group = 25 years The average age of the second group = 25 * 2 = 50 years After 6 years the average age of the first group = 25 + 6 = 31 years After 6 years the average age of the second group = 50 + 6 = 56 years The required ratio = 31 : 56

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