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1) Sergio has scored 84, 72, and 81 on the rst three exams in his math class. If the standard 70,80,90 scale is used for

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1) Sergio has scored 84, 72, and 81 on the rst three exams in his math class. If the standard 70,80,90 scale is used for grades of C, B, and A, and the exams are equally weighted, what is the minimum he can score on the final exam in order to: (3 poms sad!) 3) get a C average on exams? C] b) get a B average on exams? :1 (2) get an A average on exams? [j

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