又觉得是答案错了，求赐教

rebeccatj

又觉得是答案错了，求赐教
是GWD2的一道题
红色是我的答案，蓝色是给的答案。
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: 只能算到４Ｍ＋Ｐ＝５００００因为Ｐ＞２Ｍ则Ｍ＜１０００００就算不出来了

我想求证一下，GWD是不是有一些错误答案？哪里有正确率高一点的答案啊？谢谢大家了

Jaycandoit

又觉得是答案错了，求赐教
是GWD2的一道题
红色是我的答案，蓝色是给的答案。
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: 只能算到４Ｍ＋Ｐ＝５００００因为Ｐ＞２Ｍ则Ｍ＜１０００００就算不出来了

我想求证一下，GWD是不是有一些错误答案？哪里有正确率高一点的答案啊？谢谢大家了

-- by 会员 rebeccatj (2012/10/28 22:51:54)

答案是C吧，设material的cost是x，profit是y，根据（1）total cost是3x，所以labor的cost是2x，由（2）知道y>2x，x<y/2又知道3x+y=500000，所以x=（500000-y）/3 <y/2,解出来y：y>1000000/5=200000>150000,答案为C

rebeccatj

真的很感谢解答！原是是这样，我一开始没化成X<Y/2d的，所以一直没有突破~这的很感谢解答！谢谢