求解一道逻辑假设题

何小媛159753 · 发表于 2011-6-23 13:42:30

逻辑假设题:Inspection system X and inspection system Y, though based on different principles, each detect all product flaws but they each also erroneously reject three percent of flawless products. Since false rejections are very costly, money will be saved by installing both systems, instead of either one or the other, and rejecting only products found flawed by both.
The argument above requires which of the following assumption?

C.In their price range, system as X and Y are the least error-prone inspection systems on the market.
这个答案为什么不对呢？求各位高手给出详解

A.

colasama · 发表于 2011-6-23 17:35:26

只要两个同时用有效果就行了
没有说一定要是所有方法中效果最好的

colasama · 发表于 2011-6-23 17:45:57

上面”有效果“是指比单独用这两个中的任何一个的效果好～

何小媛159753 · 发表于 2011-7-4 22:43:21

谢谢啦

求解一道逻辑假设题

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