marks distribution:

 0- 9	 0
10-19	 1
20-29	 4
30-39	 2
40-49	 7
50-59	17
60-69	16
70-79	13
80-89	 1
90-99	 3
100	 1

average: 58.9, median: 60

correlation with courseworks:

number 		average
submitted	marks on test	%(A+B)	%pass

0-3		52.3		31.6	68.4
4		61.8		59.1	97.7