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标题: A construction company was paid a total of $500,000 for a construction project. [打印本页]

作者: 老褚2    时间: 2012-10-10 10:14
标题: A construction company was paid a total of $500,000 for a construction project.
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 $150,00
0?请问各位大神,这道题怎么做急急急!!!!!
作者: 不再惶惑    时间: 2016-10-18 16:40
两个条件联立应当为:P+L+M=500000
条件一:L+M=总成本=3M 所以2M=L,M=L/2
条件二:P>L=2M
therefore P+P+P/2>500000 then P>200000

作者: 不再惶惑    时间: 2016-10-18 16:41
(1)和(2)都分别不充分

作者: 不再惶惑    时间: 2016-10-18 16:42
原题应该是: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.





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