prep ds1中关于集合的错题特来请教

mymengming

最后两题,是PREP-DS2中的.

132.     14175-!-item-!-187;#058&010326

If the drama club and music club are combined, what percent of the combined membership will be male?

(1)  Of the 16 members of the drama club, 15 are male.

(2)  Of the 20 members of the music club, 10 are male.

这题不知道该怎么画图.答案是E,是因为合并后的总人数未知吗?

  这个好像没法画成表格的形式，但是由于不知道drama和music club的member的重合程度，所以无法确定

 

185.     17987-!-item-!-187;#058&011677

Of the 200 members of a certain association, each member who speaks German also speaks English, and 70 of the members speak only Spanish.  If no member speaks all three languages, how many of the members speak two of the three languages?

(1)  60 of the members speak only English.

(2)  20 of the members do not speak any of the three languages.

这题题目说:第一个说德语的都会说英语,而条件1说60个人只说英语,那表示画图应该将说德语的包括在英语圈里,则说两种语言的就是说德也说英的,为X,60+X+70-20=200,请问对吗?

thanks a lot!

这题最好还是画图

[attachimg]65073[/attachimg]

应该是60+X+70+20=200

maomm

再次感谢版主的答复.祝福你!!!