Mathematics, 13.08.2019 00:30, zahid79

The average (arithmetic mean) ages, in years, of the people in group a and group b are 41 and 36, respectively. the average age, in years, of the people in the two groups combined is 38. if there are no people in both group a and group b, what fraction of the people in the two groups combined are in group b?

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The average (arithmetic mean) ages, in years, of the people in group a and group b are 41 and 36, re...