quiz grades for groupA                          avg
9349-197  9 23  2 22                            18.00
7514-114 19 21  6 18                            19.33
1403-087 18 17  3  6                            13.67
4562-961 10  0  0  0                             3.33
1482-890 11 14 12  7                            12.33
3395-179 16  9  0  0                             8.33
1551-857 18 20 16  0                            18.00
8135-057 25 24 21 11                            23.33
4006-465  7 15  0  0                             7.33
6036-059 10 21 25 24                            23.33
1357-150 13 25  0 15                            17.67
3064-242  8 19  0  0                             9.00
8450-312 19 24 19  6                            20.67
5461-174 25 24 17  0                            22.00
8846-818 25 22 24  0                            23.67
4761-087 25 23  0 17                            21.67
5571-601 22 23 17  6                            20.67
5766-668 25 24 14 17                            22.00
the average was computed with  1 drop