Question
The average age of a group of plumbers and lawyers is 31. If the average age of the plumbers is 28 years and that of the lawyers is 40 years, what is the ratio of the number of plumbers to lawyers?
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The average age of a group of plumbers and lawyers is 31. If the average age of the plumbers is 28 years and that of the lawyers is 40 years, what is the ratio of the number of plumbers to lawyers?