Mathematics, 16.07.2019 22:10 jeffro198004

On a certain exam, tony corrected 20 papers and found the mean for his group to be 60. alive corrected the remaining 10 papers and found that the mean for her group was 50. what is the mean of the combined group of 30 students?

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On a certain exam, tony corrected 20 papers and found the mean for his group to be 60. alive correct...