quiz grades for groupA                          avg
0188-567  4  0  0  0                             1.33
5118-517  0  0  0  0                             0.00
5985-996 14 20 18 20                            19.33
5291-634 11 20 19 15                            18.00
4048-228  0  0  0  0                             0.00
0212-161 25 18 24 25                            24.67
7763-462  0  4  0  0                             1.33
5593-893 17 15 12  2                            14.67
6752-863 12 13 12 11                            12.33
1964-708  0 14  6  5                             8.33
3672-408 19 13  0  0                            10.67
9153-937 25 24 20  0                            23.00
8432-637 13 20 16 10                            16.33
4893-633 16 18  8  8                            14.00
5993-503 25 22 10 16                            21.00
7524-390 25 20  0  0                            15.00
0765-971 18  0  9 10                            12.33
6963-403  0  0  0  0                             0.00
8454-873 13 19 14  2                            15.33
9829-864  3  6  6  6                             6.00
0998-529  4 21 18  7                            15.33
2001-261  2 15  8  7                            10.00
7901-499  6 19  4  4                             9.67
0483-325  8  0  0  0                             2.67
4834-181  0 16  0  0                             5.33
the average was computed with  1 drop