46 exams were submitted and scores ranged from 28% to 84%.
The mean score was 55.13%.

As a result, I curved the scores, raising each score +20 points.
The scores then ranged from 48% to 104% and the mean score was 75.13%.

The numerical score will correspond to a letter grade as follows:
 

Grade	Percentages	# Receiving
A	90-100%	7
B	80-89%	12
C	70-79%	11
D	60-69%	10
F	<60%	6