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13问答网 > 一次数学测试,全班50人中,做笫对一道附加题的有27人,做对第二道题的有29人,全？

一次数学测试,全班50人中,做笫对一道附加题的有27人,做对第二道题的有29人,全？

2025-03-16 14:15:50

推荐回答（2个）

回答1：

做对一题的总人数是27+29=56人，做错第一题的人数是50-27=23人，做错第二题的人数是50-29=21人，故至少做错一题的总人数是23+21=44人，所以两题都做对的人数是56-44=12人。

回答2：

你没有把题说完，所以就无法帮你解答。

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