又觉得是答案错了，求赐教

rebeccatj

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

passme

Cost= Labor+Material
设material = X
1. X+Labor=3X
labor=2X
not suff
2.
not suff

1+2得到下面结论:
500,000-3X>2X
500,000>5x
X<100,000
把题里的问题profit是否>150,000再写一遍：
500,000-3X>150,000
3X<350,000
X<116700
也就是说，我们只要看X是否<116700就行了。
上面我们知道X<100,000, 所以suff

rebeccatj

哦，呵呵！对哈，这样就豁然开朗了，！真的很感谢你的解答