quiz grades for groupC                          avg
1762-336 18  4 21 12                            17.00
6858-225  0  3 14 13                            10.00
1019-970  3 12 16  6                            11.33
1325-514 25 25 22 17                            24.00
1599-958 13 12 11  0                            12.00
5767-480  2  0  0  0                             0.67
9538-865 23 16 22 13                            20.33
7117-024 20 13 16  6                            16.33
4092-126 12 14 16  6                            14.00
5407-395  6  3  0  0                             3.00
2503-575 25 21 22  7                            22.67
1608-047 25 13 24 11                            20.67
5883-107 22 16 17 12                            18.33
3792-339 18  2  8  0                             9.33
8448-970 21  0  0  0                             7.00
4300-222 22  3  0  0                             8.33
9087-625 19 16 22 15                            19.00
7578-411 24 22 23 20                            23.00
8114-433  0  0  0  0                             0.00
4066-978 25 22 13  0                            20.00
9910-037  0  0  0  0                             0.00
1260-870 22 22 18 17                            20.67
0502-715 23 11 25 22                            23.33
the average was computed with  1 drop