标题: PREP一道，不解 [打印本页] 作者: TheAssembly 时间: 2009-12-15 22:57 标题: PREP一道，不解 IF drama club and music club are combined, what percent of combined membership will be male? 1.of the 16menbers of the drama club, 15 are male 2.of the 20 members of the club, music 10 are male 为什么答案是E啊？作者: TheAssembly 时间: 2009-12-15 23:34
有同学帮一小忙没？作者: dorislee1991 时间: 2009-12-15 23:40
因为可能有人同时参加drama和music club作者: TheAssembly 时间: 2009-12-15 23:47
我擦。。我承认我火星了 多谢LS作者: a10285 时间: 2009-12-15 23:52
同意