quiz grades for groupB                          avg
7367-294 25 25 25 22                            25.00
6791-842 14  6  9 11                            11.33
6492-020 22 25 10 11                            19.33
4866-706 11 20  0  0                            10.33
7917-356  3  8 10 12                            10.00
7923-749  0  9  1 12                             7.33
5945-684  6 13 11 12                            12.00
0004-517 25 20 15 15                            20.00
6528-335 17 25 10 25                            22.33
2270-883  3 12  6 12                            10.00
6289-048 17 20  3  5                            14.00
0232-895  0  0  0  0                             0.00
1999-994  6 24  0  3                            11.00
9309-743  4  7  0  0                             3.67
2887-945 13 17 10 14                            14.67
2252-431 24 24 24 12                            24.00
5144-126  2 13  8 12                            11.00
7090-865 13 21  8  8                            14.00
2954-332 25 22 11 25                            24.00
7265-635  8  0  0  0                             2.67
0500-841  0  0  0  0                             0.00
the average was computed with  1 drop