1. 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
这种文字转换题是我的弱项， 答案选择C， 烦请大家给我解释一下，谢谢
2. A contractor combined X tons of a gravel mixture that contains 10 percent gravel G, by weight, with Y tons of a mixture that contains 2 percent gravel G, by weight, to produce Z tons of a mixture that was 5 percent gravel G, by weight. What is the value of X?
(1) Y=10
(2) Z=16
答案选择D， 我列了一个等式，应该是必须Y,Z两个量知道了才行，不知道为什么是D。谢谢大家的解释 | 
