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In a certain statistics course, four exams were given. Each student's grade was based on a weighted average of his exam scores. The first two

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In a certain statistics course, four exams were given. Each student's grade was based on a weighted average of his exam scores. The first two tests had weights of 3, the third test had a weight of 2, and the final test had a weight of 1. The exam scores for one student are listed below. Exam Grade 75.2 78.4 AWN- 85.8 93.3 The student's overall average was

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