![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
某次数学考试共5道题,全班52人参加,共做对181题.已知每人至少做对1题;做对1道题的有7人,做对2道题的人和做对3道题的人一样多,做对5道题的有6人,那么做对4道题的人数是()
A.29
B.31
C.33
D.35
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
C、33
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.29
B.31
C.33
D.35
C、33
A.10x-5(20-x)≥90
B.10x-5(20-x)>90
C.10x-(20-x)≥90
D.10x-(20-x)>90
A.60
B.62
C.78
D.70
A.奇数
B.偶数
C.奇数或偶数
A.1/5
B.3/10
C.2/5
D.1/2