A professor grades students on three tests, four quizzes, and a final examination. Each test counts as two quizzes and the final examination counts as two tests. Sarah has test scores of 91, 95, and 74. Sarah's quiz scores are 62, 81, 94, and 78. Her final examination score is 91. Use the weighted mean formula to find Sarah's average for the course. (Round your answer to one decimal place.)

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