This score was worth 70% of their final exam grade (the other 30% had been determined by their classmates in their group oral presentations). The final exam as a whole was 20% of their final (semester) grade.
No one element in the final was worth more than 15% of their final grade. Personally, I always hated it when final exams were the deciding factor in your final grade for a course. Some people just don’t test well, especially at the end of a long semester. For many of my students this was their first semester of college finals and I know they were nervous. I tried to be sensitive to all of those things when thinking about the weight of this exam and its impact upon their grade.