If the cost price of 16 books is equal to the selling price of 20 of them, what will be the loss in this transaction?
1). 20%
2). 25%
3). 5%
4). 10%
Let the C.P of 1 book be Re. x
C.P of 20 books = Rs. 20x
C.P of 16 books = S.P of 20 books = Rs. 16x
Loss = Rs. (20x - 16x) = Rs. 4x
∴ Loss% = 4x/20x × 100 = 20%