A man sells two books at Tk. 120 each and by doing so he gains 25% on one book and loses 25% on the other. His loss on the whole in Tk. is = ?

Question: A man sells two books at Tk. 120 each and by doing so he gains 25% on one book and loses 25% on the other. His loss on the whole in Tk. is = ?

Solution:
Sells price of two books = (120 × 2) = Tk. 240
Cost price of first book = (100/125) × 120
= Tk. 96

Cost price of second book = (100/75) × 120
= Tk. 160

∴ Loss = (160 + 96) - 240
= 256 - 240
= Tk. 16