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On June 1 the average age of the 50 employees in a certain school was 47 years. On June 1 three of the staff aged

On June 1 the average age of the 50 employees in a certain school was 47 years. On June 1 three of the staff aged 65, 68 and 62 retired and were replaced by four employees aged 24, 31, 26 and 28. What was the average age now

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