Mohan bought 25 books for Rs. 2,000 and sold them at a profit equal to the selling price of 5 books. The selling price of 1 book is: 

The cost price of 60 articles is same as the selling price of x articles. If there is a profit of 20%, then what is the value of x?

A man gain 15% by selling a calculator for a certain price. If he sells it at the triple price, then what will be the profit percentage?

The cost price of 10 articles is equal to the selling price of 9 articles. Find the profit percent.

A shopkeeper bought goods for Rs. 2025. He sold $$ {1\over 5}$$ th of it at 20% profit and the remaining at the profit of 5%, the profit per cent on the whole is

An article is sold at a profit of 20% of its cost price. If cost price and selling price reduces by Rs 10 and Rs. 5 respectively, then the percentage profit increased to 30%. Find the cost price?

A shopkeeper sells a watch set on discount of 8% of printed price and gain 25 %. If marked price was Rs. 20,000 then, what was the cost price?