The stem-and-leaf plot show a spring 2019 pre-calculus class' scores for their first exam: 3 3 4 2,9,9 5 3,5,5 6 1,3,7,8,8,9,9 7 2,3,4,8 8 0,3,8,8,8 9 0,2,4,4,4,4,6 10 0 Round each answer to two decimal places. Find the mean of the scores for the first exam.

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