Brand X coffee costs twice as much as brand Y coffee. If a certain blend is 3/4 brand X and 1/4 brand Y. what fraction of the cost of the blend is Brand X?  Choose one
A) a. 6/7
B) b. 2/5
C) 3. 1/2
D) 4. 2/3
E) 5. 3/4
Assume Cost of X= Ca = 200 , Cost of Y = Cb=100   The blend contains 0.75 X and 0.25 Y ---&gt; Cost of the blend = Cbl = 0.75*200+0.25*100= 
<gadget id="calculator">0.75*200+0.25*100</gadget>
<output>175</output>
175   Thus fraction of X in the blend= 0.75*200/175 = 6/7.   a. 6/7nswer : a. 6/7
<result>A</result>
Brand X coffee costs twice as much as brand Y coffee. If a certain blend is 3/4 brand X and 1/4 brand Y. what fraction of the cost of the blend is Brand X?