Question: The same absent-minded professor (from 1(a)) is also teaching a calculus class with 17 students enrolled. The average on the first exam was 81.50; however,

The same absent-minded professor (from 1(a)) is also teaching a calculus class with 17 students enrolled. The average on the first exam was 81.50; however, the professor accidentally recorded one students' score, which should be a 91, as 19. After correcting the error, by how much did the average increase or decrease. Please explain how you arrived at your answer and your reasoning

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