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标题: 请问GWD11-35(math) [打印本页]

作者: johnsonwxjs 时间: 2007-1-29 07:04 标题: 请问GWD11-35(math)

On Monday a store had a sale on bottles of juice S and juice T. If the total number of bottles of juice S in stock were sold on Monday, for which juice, S or T, were more of the bottles sold that day?

(1) Two-thirds of the total number of bottles of juice T in stock were sold on Monday.

(2) At the beginning of the sale, there was a total of 90 bottles of juice S and 60 bottles of juice T in stock.

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.

这道题我觉得应该选A,我的思路是设总共卖了x,那么s就应该是(1/2)x,A的条件是T卖出了2/3，那么就可以表示为(2/3)x．x都是指卖出的总数，这样就可以比较出谁多了．请问我的思路错在什么地方．请大家帮我看一下，谢谢各位了．

作者: qiuqiaomm 时间: 2007-1-29 20:13

首先你假設了兩個bottle是一樣多"我的思路是设总共卖了x,那么s就应该是(1/2)x"但是原題只有提到有兩種沒有表明兩者關係  所以你做了一個錯誤假設  正題目沒有表明兩者bottle的多寡所以A選項無法得知  反觀B選項他明確指出S多餘T且S於Monday全數賣出所以不管T所賣多少必定少於S  所以我認為ANS：B

作者: johnsonwxjs 时间: 2007-1-30 20:35

明白了。谢谢！！！！！！！！！

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