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Shaahin Ashayeri · Answer 1 · 2019-12-04T02:53:58+0000

The average for 10 students was 65, so the total points would be 65 * 10 = 650

The average for 12 students was 60, so the total points would be 60 *12 = 720

The difference = 720 - 650 = 70

The average of the difference in 2 grades = 70 / 2 = 35

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