quiz grades for groupB                          avg
8332-059  9  1 10 14                            11.00
1530-489 21 23 17 22                            22.00
3551-031 19  8  5 15                            14.00
3473-353 25 25 23 25                            25.00
0472-454 15  0  8  5                             9.33
8294-300 25  0  0  0                             8.33
3259-732  0  0  0  0                             0.00
9004-502 11 19  6 10                            13.33
0001-523 21 21  9  7                            17.00
8911-101 19 10 13 11                            14.33
8712-743 21 24 15 10                            20.00
3253-606  0  0  0  0                             0.00
3178-201  7 25 11 24                            20.00
7984-447 25 25 18 24                            24.67
4211-902  8 18 25  0                            17.00
0742-515  4 13  4  3                             7.00
5844-674  0  0  0  0                             0.00
6459-505  0  0  0  0                             0.00
4616-982 14  3 10  7                            10.33
0330-942  2 18 14  0                            11.33
3584-069 15 16 20  5                            17.00
4833-804 25 23 21 21                            23.00
6257-560  5  0  0  0                             1.67
5140-592  5  0  0  0                             1.67
the average was computed with  1 drop