探讨一道逻辑

xiahuistacy · 发表于 2009-12-25 17:14:25

Shipping Clerk: The five specially ordered shipments sent out last week were sent out on Thursday. Last week, all of the shipments that were sent out on Friday consisted entirely of building supplies, and the shipping department then closed for the weekend. Four shipments were sent to Truax Construction last week, only three of which consisted of building supplies.

If the shipping clerk’s statements are true, which of the following must also be true?

A. At least one of the shipments sent to Truax Construction last week was specially ordered.

B. At least one of last week’s specially ordered shipments did not consist of building supplies.

C. At least one of the shipments sent to Truax Construction was not sent out on Thursday of last week.

D. At least one of the shipments that were sent out on Friday of last week was sent to Truax Construction.

E. At least one of the shipments sent to Truax Construction last week was sent out before Friday.

这个题目怎么做啊完全没有头绪答案是E

tangyp · 发表于 2009-12-25 20:03:00

是E啊，这里有三个命题：
specially ordered Thursday
Friday entirely of building supplies
to Truax Construction only 3 with building supply (the other not)
所以，to Truax Construction 至少有一个（the other）不是在Friday（因为Friday的entirely of building supplies）

本贴相关题目 TN-02-CR-20 (PELO)

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