[求助]OG Diagnostic Test第29题想不通。。。

jessica_cxy

In a survey of retailers, what percent had purchased computers for business purposes?

(1) 85 percent of the retailers surveyed who owned their own store had purchased  computers for business purposes.

(2) 40percent of the retailers surveyed owned their own store

我不解的是为什么“won store”（40%）的 会比“既own store又buy computers for business purpose的（８０％）”少呢？后者应该是前者的子集吧？还是我哪里理解有问题呢？　

jessica_cxy

哪位好心人可以回答以下么？谢谢

raorao0401

   (1)85 percent of the retailers owned their stores had purchased computers for bussiness purposes

      in  a  nutshell,85 percent of 第（2）问的是the retailers owned their stores人数 had purchased computers for bussiness purposes

      第一问只是说85percent的那种人had purchased computers for bussiness purposes

   

jessica_cxy

哦，明白了！非常感谢！