![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
已知9个数的平均数是72,去掉一一个数后,余下的数平均数为78,去掉的数是()
A.21
B.22
C.23
D.24
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
D、24
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.21
B.22
C.23
D.24
D、24
A.1:1
B.35:36
C.36:35
D.2:1
E.1:2
A.1
B.2
C.3
D.4
A.1
B.2
C.3
D.4
A.SP=2502H,BX=1020H
B.SP=2504H、BX=4030H
C.SP=2504H,BX=3040H
D.SP=2500H,BX=2010H