Two brothers took the GMAT exam, the higher score is X and the lower one is Y. If the difference between the two scores 1/4, what is the value of Y/X ?  Choose the correct choice from the following answers:
A) 3.
B) 2.
C) 1/5
D) 1/3.
E) There isn't enough data to answer the question.
Answer is 1/5 : 1/5   X - Y = (X + Y)/4   Solving for Y/X = 1/5
<result>C</result>
Two brothers took the GMAT exam, the higher score is X and the lower one is Y. If the difference between the two scores 1/4, what is the value of Y/X ?