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histograms (removed)
typical economics grade distribution
top 2.7 percent: A+
next 14.7 percent: A
next 10.2 percent: A-
next 11.0 percent: B+
next 14.3 percent: B
next 9.2 percent: B-
next 7.3 percent: C+
next 9.8 percent: C
next 5.1 percent: C-
next 3.4 percent: D
next 11.0 percent: F or withdrawal
the average score you achieve on the exams will not matter by itself for your final grade. only your score relative to your classmates matters. if everyone else gets 2 out of 50 points, for instance, while you get 3, your grade will be an A+. if everyone else gets 47 out of 50 points but you get only 45, your grade will be a D. of course, the distribution of raw scores is typically much wider so that final grades are well assigned by the curve. given voluntary withdrawals, the letter grade F is rare and assigned only if a student's performance falls below an absolute minimum, independent of the class-wide raw score distribution.