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The second sheet of the spreadsheet linked above contains the scores of 50 students on 4 different exams, as well as weights that should be

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The second sheet of the spreadsheet linked above contains the scores of 50 students on 4 different exams, as well as weights that should be adjusted and used in the below question. What is the weighted mean of Student 7's exam scores when Exam 4 is weighted three times that of the other 3 exams?

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