1 . 某射手射击所得环数的分布列为
已知的均值,则的值分别为( )
7 | 8 | 9 | 10 | |
0.1 | 0.3 |
A.0.2,0.3 | B.0.3,0.4 |
C.0.2,0.4 | D.0.4,0.2 |
您最近半年使用:0次
7 | 8 | 9 | 10 | |
0.1 | 0.3 |
A.0.2,0.3 | B.0.3,0.4 |
C.0.2,0.4 | D.0.4,0.2 |