Read the following SAT test question, then click on a button to select your answer.
To make an orange dye, 
parts of red dye are mixed with 
parts of yellow dye. To make a green dye, 
parts of blue dye are mixed with 
part of yellow dye. If equal amounts of green and orange are mixed, what fraction of the new mixture is yellow dye?
A. 
B. 
C. 
D. 
E. 
