Mathematics, 24.08.2019 11:20 christyr2002

There are 30 students in a class that took a test. the average grade of 10 students was 80. the other 20 students average was 89. what is the overall average for all 30 students?

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There are 30 students in a class that took a test. the average grade of 10 students was 80. the othe...

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