A milk merchant buys 50 litres of milk at the rate of Rs 40 per litre and mixes 5 litres of water in it. If he sells this mixture at the rate of Rs 42 per litre, then what is the profit percentage for the dealer?
The pie chart shows tickets sold (in 1000s) per month by 6 different airlines (A, B, C, D, E, F). Study the diagram and answer the following questions.
Which airline sold the second highest number of tickets?
A person invested a total sum of Rs 7900 in three different schemes of simple interest at 3%, 5% and 8% per annum. At the end of one year he got same interest in all three schemes. What is the money (in Rs) invested at 3%?