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标题: 涛涛26-31题? [打印本页]

作者: gmatnodig 时间: 2008-1-17 20:50
标题: 涛涛26-31题?

Q31:

One kilogram of a certain coffee blend consists of x kilogram of type I coffee and y kilogram of type II coffee. The cost of the blend is C dollars per kilogram, where C = 6.5x + 8.5y. Is x < 0.8?

(1) y > 0.15

(2) C ≥ 7.30

答案:B

我选E

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