简单数学一道 急急 谢谢了

guo573874201

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.答案选C  题中的500000指的是什么？

edc1314

预算500 大于等于 L+M，问利润

chillic

$500,000 是公司一共付的钱
根据第二句话，这$500,000= labor +material

stevenliang

条件一给了M是多少，给了L是多少，条件二说利润比L的成本高，那还不知道吗？选C

erikachen

楼上错了，WAS paid, 被动用法，说明是revenue，不是cost。

M+L+profit=500k

根据（1），L=2M ，因此Profit=500k - 3M，不能单独计算
根据（2），Profit > L , 不能单独计算
结合（1）（2），500K-3M>2M, 因此 M < 100K, L < 200K,  rofit > L , 即>= 200k, 所以选C