posted by tommy .
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. Sara has test scores of 60, 80, and 89. Sara's quiz scores are 85, 94, 83, and 84. Her final examination score is 60. Use the weighted mean formula to find Sara's average for the course. (Round your answer to one decimal place.)