請教一題OG上的DS~~實在看不懂

wealthylun · 发表于 2012-2-21 23:33:53

想請教大家一題OG上的DS, 我實在看不懂選項A的描述會跟題意有任何相干, 但是解答就很巧妙的推出20%....

Of the companies surveryed about the skills they required in prospective employees , 20% required both computer skills and writing skills. What percent of the companies surveryed required neither computer skills nor writing skills?

(1) Of those companies surveyed that required computer skills, HALF required writing skills.

解答說: This information ONLY establishes that 20% required computer skills , but not writing skills. 實在看不懂20%是怎麼推出來 ~

(2) 不敘述了

Thank you

kaoruya · 发表于 2012-2-22 01:26:19

因为要求computer的里面一半要求writing，换句话说要求computer的里面一半两个都要求，而两个都要求的占20%，所以要求computer而不要求writing的就等于两个都要求的等于20%

wealthylun · 发表于 2012-2-22 21:20:12

發現了 ~~~ 謝謝

請教一題OG上的DS~~實在看不懂

所属分类: GMAT考试

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