A trader makes a profit equal to the selling price of 75 articles when he sold 100 of the articles . What % profit did he make in the transaction?

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?

The price of 6 pencils is Rs. 30 and that of 12 pens is Rs. 120. What is the average price of 50 pencils and 50 pens?

A vendor buys bananas at 12 for 45 and sells at 5 for 35. What will be the gain ? 

A merchant has 1000 kg sugar, some part of which he sells at 8 % profit and the rest at 18 % profit. He gains 14 % on the whole. The quantity sold at 8 % profit is: 

A phone is sold for Rs. 860 at a loss of 20% for how much should it be sold gain 10%?

If an article is sold at 200 % profit then the ratio of its cost price to its selling price will be 

By selling an article for Rs. 450, I lose 20%. For what price should I sell it to gain 20% ?