Question
The average age of a group of engineers and plumbers is 40. If the average age of the engineers is 38 years and that of the plumbers is 50 years, what is the ratio of the number of plumbers to engineers?
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The average age of a group of engineers and plumbers is 40. If the average age of the engineers is 38 years and that of the plumbers is 50 years, what is the ratio of the number of plumbers to engineers?