Study the following Pie Chart and answer the questions that follow: Total number of teachers are 1800, teach different subjects
What is the total number of teachers teaching Chemistry, English, and Biology?
A sum of Rs. 800 amounts to Rs. 920 in 3 years at simple interest. What would be the amount, if the interest rate is increased by 3%?
In what ratio must water be mixed with milk to gain 20% by selling the mixture at cost price?