A student took 6 courses last year and received an average (arithmetic mean) grade of 100 points. The year before, the

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A student took 6 courses last year and received an average (arithmetic mean) grade of 100 points. The year before, the student took 5 courses and received an average grade of 90 points. To the nearest tenth of a point, what was the student’s average grade for the entire two-year period?

A. 79
B. 89
C. 95
D. 95.5
E. 97.2

Answer: D

Source: Princeton Review
Source: — Problem Solving |