I bought two books; for Rs.600. 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?	Options
A) 197	B) 280	C) 189	D) 278	E) 350

Rationale: "x * ( 85 / 100 ) = ( 600 - x ) 119 / 100 x = 350 answer : e"
Answer: E