It was a little tricky to decide how to map grades to exam scores, since there were no clean dividing lines. If you’re on the border, we’ve noted it, and will take that into account when figuring out the final grades. Here are cutoffs (if you get this score or above, you get the corresponding grade):
90:A, 85:AB, 75: B, 74:B?, 69:BC, 60:C, 57:C/D, 50:D
The median grade is a B. A lot of people scored 74 (which is just below the median). We understand that many people do better on projects than exams, and take that into account during grading.