Mathematics, 24.01.2022 01:00, tasiaandrews123

There are three exams in a marking period. A student received grades of 75 and 81 on the first two exams. What grade must the student ears on the last exam to get an average
of no less than 80 for the marking period?

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There are three exams in a marking period. A student received grades of 75 and 81 on the first two...