等级 |
成绩n/分 |
频数 |
A |
94.5<n≤100 |
2 |
89.5<n<94.5 |
||
B |
84.5<n<89.5 |
6 |
79.5<n<84.5 |
14 |
|
C |
74.5<n<79.5 |
16 |
69.5<n<74.5 |
||
D |
64.5<n<69.5 |
3 |
59.5<n<64.5 |
2 |