1. The marked price of a chair is 40% more than its cost price. If the chair is sold for Rs 520 after a discount of Rs 40, then what will be the profit percentage?
6. A and B invest Rs. 3000 and Rs. 2400 respectively in a business. If after one year there is a loss of Rs. 720, how much loss will B bear? (Loss or Profit is in proportion to their investments)
7. A merchant buys 25 litres of milk daily at the rate of ? 12 per litre. He mixes 5 litres of water in it and sells at the rate ? 10.40 per litre. His gain/loss is: