Math Question: Solve the system of equations: 2x + y = 10 and x - 3y = 7. (
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Question: The scores of 20 students in a math test were: 85, 90, 78, 88, 92, 89, 85, 86, 91, 89, 85, 88, 83, 90, 92, 88, 85, 90, 89, 87. What is the mean, mode, median, range, and average of the scores?