涛涛26-31题?

gmatnodig

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