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QUESTION
on tuesday, 20 of the 25 students in a chemistry class took a test, and thier average was 80. On Friday, the other 5 students took the test, and...
on tuesday, 20 of the 25 students in a chemistry class took a test, and thier average was 80. On Friday, the other 5 students took the test, and their average was 90. What was the average for the entire class?
