31 exams were submitted and the scores ranged from 44% to 96%.
The mean score was 73.87%.
As a result I curved the scores +2 points and
the scores then ranged from 46% to 98% and the mean score was 75.87%

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

Grade	Percentages	# Receiving
A	90-100%	5
B	80-89%	9
C	70-79%	6
D	60-69%	8
F	<60%	3