Question

A book seller buys 200 books for 12000 rupees. He wants to sell those on a profit so that he gets 20 books free of cost. By what percent profit he should sell books?​

Answer 1

Answer:

According to question,

CP of 200 book = 12000

CP of 1 book = $\large{\frac{12000}{200}}$

= Rs. 60

To get 20 books free

Profit = 20×60 = 1200

i.e. 10% of Rs. 12000

⇒10% gain