GMAT data sufficiency One kilogram of a certain coffee blend consists of x kilogram of type 1 coffee and y kilogram of type 2 coffee.the cost of the blend is C dollars per kilogram,where C=6.5x+8.5y.Is x0.15(2)C大於等於7.30但我觉得是E
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![GMAT data sufficiency One kilogram of a certain coffee blend consists of x kilogram of type 1 coffee and y kilogram of type 2 coffee.the cost of the blend is C dollars per kilogram,where C=6.5x+8.5y.Is x0.15(2)C大於等於7.30但我觉得是E](/uploads/image/z/13331610-18-0.jpg?t=GMAT+data+sufficiency+One+kilogram+of+a+certain+coffee+blend+consists+of+x+kilogram+of+type+1+coffee+and+y+kilogram+of+type+2+coffee.the+cost+of+the+blend+is+C+dollars+per+kilogram%2Cwhere+C%3D6.5x%2B8.5y.Is+x0.15%282%29C%E5%A4%A7%E6%96%BC%E7%AD%89%E6%96%BC7.30%E4%BD%86%E6%88%91%E8%A7%89%E5%BE%97%E6%98%AFE)
GMAT data sufficiency One kilogram of a certain coffee blend consists of x kilogram of type 1 coffee and y kilogram of type 2 coffee.the cost of the blend is C dollars per kilogram,where C=6.5x+8.5y.Is x0.15(2)C大於等於7.30但我觉得是E
GMAT data sufficiency
One kilogram of a certain coffee blend consists of x kilogram of type 1 coffee and y kilogram of type 2 coffee.the cost of the blend is C dollars per kilogram,where C=6.5x+8.5y.Is x0.15
(2)C大於等於7.30
但我觉得是E
GMAT data sufficiency One kilogram of a certain coffee blend consists of x kilogram of type 1 coffee and y kilogram of type 2 coffee.the cost of the blend is C dollars per kilogram,where C=6.5x+8.5y.Is x0.15(2)C大於等於7.30但我觉得是E
因为 1 kg的blend 里面含有 x kg 第一种和 y kg 第二种,所以 x+y=1;
则 C=8.5-2x
(1)因为 y>0.15,所以 x<0.85,不能确定 x 与0.8大小关系
(2)8.5-2x>=7.3,解得 x<=0.6 ,可以确定
所以选 B
都说了C=6.5x+8.5y了,应该就是只有这两种,没有别的混合物了,我是这么想的,不知道对不对