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标题: 請教一題OG MATH [打印本页]

作者: b719061 时间: 2007-6-11 18:05
标题: 請教一題OG MATH

In a survey of reatilers, 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)40 percent of the retailers surveryed owned their own store

答案是:both statements together are still not sufficient

可是我覺得(1)有把解釋說出來,請問有大大能跟我說明一下嗎?

作者: sammy生米 时间: 2007-6-11 18:38
(1)和/或(2)：没店铺的零售商购置电脑的百分比未知，所以求不出

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