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GWD-7-11、29

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发表于 2010-5-28 20:56:51 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
Q29:
Leo can buy a certain computer for p1 dollars in State A, where the sales tax is t1 percent, or he can buy the same computer for p2 dollars in State B, where the sales tax is t2 percent.  Is the total cost of the computer greater in State A than in State B?
(1)      t1 > t2
(2)      p1t1 > p2t2
    
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Answer: E
我觉得可以选C啊
通过(1)(2)可以知道p1>p2
p1*(1+t1%)>p2*(1+t2%)  有什么地方想的不对?

Q14:
If a code word is defined to be a sequence of different letters chosen from the 10 letters A, B, C, D, E, F, G, H, I, and J, what is the ratio of the number of 5-letter code words to the number of 4-letter code words?

A.    5 to 4
B.    3 to 2
C.    2 to 1
D.    5 to 1
E.    6 to 1
Answer: E
难道不是C10 5/C10 4么。。。。
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