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(Solved): John's test scores for this marking period are: 72,84,86, and 70 . What score must John get on his n ...



John's test scores for this marking period are: 72,84,86, and 70 . What score must John get on his next test to maintain an average of 80 ? A. 80 B. 78 C. 88 D. 84 E. 79


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