I bought two books; for Rs.500. I sold one at a loss of 15% and other at a gain of 19% and then I found each book was sold at the same price. Find the cost of the book sold at a loss? Choose one.
A) 337
B) 280
C) 299.67
D) 266.67
E) 291.67

Rationale: "x * ( 85 / 100 ) = ( 500 - x ) 119 / 100 x = 291.67 answer : e"
Answer: E