国际顶尖MBA申请交流平台--TOPWAY MBA

标题: 再请教一道GWD 5-3 [打印本页]

作者: whitecloud 时间: 2005-1-16 13:50 标题: 再请教一道GWD 5-3

这道题没有找到解答。请教NN了。多谢！！！ Q3:

Material A costs $3 per kilogram, and material B costs $5 per kilogram. If 10 kilograms of material K consists of x kilograms of material A and y kilograms of material B, is x > y?

(1) y > 4

(2) The cost of the 10 kilograms of material K is less than $40.

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.

I chose E. why the key is B, please help me to solve it.

作者: sammen 时间: 2005-1-16 16:15

我认为是B，条件1，说明不了什么的，没有限定。条件2，可以得出2个方程X+Y=10；3X+5Y〈40，可以得出Y〈5，那么得出X〉Y了。

作者: mikejia 时间: 2005-1-17 23:53

B

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