On selling a pencil at 5% loss and a book at 15% gain, Kiran gains Rs 7. If he sells the pencil at 5% gain and the book at 10% gain, then he gains Rs 13. The actual price of the book is
Options:
A) Rs 100	B) Rs 80	C) Rs 90	D) Rs 400	E) None of these
Let actual price of the book = Rs X   Let actual price of the pen = Rs Y   Therefore, ( X + 15% of X) + (Y – 5% of Y) = X + Y + 7   15X - 5Y = 700 …….(i)   Rs 100lso (X + 10% of X) + (Y + 5% of Y) = X + Y + 13   10X + 5Y = 1300   Using (i) and (ii) we get X = 80, Y = 100   Therefore, actual price of the book = Rs 80   Rs 100NSWER:Rs 100
<result>A</result>
On selling a pencil at 5% loss and a book at 15% gain, Kiran gains Rs 7. If he sells the pencil at 5% gain and the book at 10% gain, then he gains Rs 13. The actual price of the book is