发新话题
打印

gwd2数学22

gwd2数学22



Q22:
A construction company was paid a total of $500,000 for a construction project.
The company’s only costs for the project were for labor and materials.
Was the company’s profit for the project greater than $150,000?

(1)

The company’s total cost was three times its cost for materials.

(2)

The company’s profit was greater than its cost for labor.



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: C
怎么看都是E阿,请帮忙看看,是我没明白题目还是答案错,谢谢!

TOP

是C
假设材料是M,人工是L,利润是P
M+L+P=500,000
(1)=>M+L=3M=>L=2M
(2)=>P>L
由(1)+(2)可知
P>2M
500,000=M+P+L=P+3M
P>3M所以P>500,000*(2/5)>150000

[ 本帖最后由 JD_Thunderbird 于 2008-5-16 21:37 编辑 ]

TOP

谢谢!果然是我数学不好

TOP

2楼的解答对第一个条件的理解是不是错了?应该是

(1)The company’s total cost was three times its cost for materials.

C=3M=M+L =》L=2M吧?

不过不影响最后答案,还是选C

TOP

回复 4# rick_wry 的帖子

你说得对
打错了,我会把上面改一下

TOP

发新话题