quiz grades for groupC                          avg
4472-247  3  9  2  4                             5.33
4383-439 15 19 14 14                            16.00
6419-189 21  0 16  0                            12.33
3668-537  6 18 10 23                            17.00
6163-582 11 20  8 20                            17.00
0715-098 13  9  0  0                             7.33
7596-725  0  0  0  0                             0.00
2207-801  2 17 11  4                            10.67
3981-622 11 12 16 13                            13.67
0779-823  7  0  0  0                             2.33
7965-791  6 16 14  3                            12.00
6260-090 25 25 20 22                            24.00
2952-462 23 25 18  7                            22.00
1303-458 25 22 16  0                            21.00
4739-644  0  0  0  0                             0.00
9226-307  9 17 12  0                            12.67
5965-415  6 10  0  0                             5.33
0695-566 21 17 14  4                            17.33
0015-962  0  5  0  0                             1.67
8698-777 22 18  0  0                            13.33
2620-956  6 19 11 11                            13.67
1085-450 25 23 25 14                            24.33
3044-804 25 22 14 11                            20.33
the average was computed with  1 drop