marks distribution:

 0- 9	 1
10-19	 1
20-29	 2
30-39	 5
40-49	 6
50-59	10
60-69	 9
70-79	14
80-89	 5
90-99	 3
100	 0

average: 60.1, median: 64

correlation with courseworks:

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

0-3		54.6		44.1	79.4
4		68.6		72.7	90.9