The pie chart below represents the instruments played by students of a school. Read the chart and answer the following questions based on it.

If there are 300 students in total, what is the difference between those who play Tabla and those who play Veena? 

The pie chart below represents the instruments played by students of a school. Read the chart and answer the following questions based on it.

The sector angle corresponding to the Violin is 

The MRP of a watch is Rs.4750. The shop sells it at 12% discount. If the shopkeeper had purchased the watch for Rs. 3,850, what is his gain? 

Selling price of an article is $${7\over6}$$ of cost price. What is the profit percentage?

What is single discount equivalent to two successive discounts of 15% and 20%?

Radius of base of a right circular cone and a sphere is each equal to r. if the sphere and cone have same volume, the what is the height of the cone?

The average of 12 number is 42. If a 13th number is added, then the average becomes 44. What is the 13th number?

By selling an article for Rs. 320, a man incurs a loss of 20%, what should be the selling price of an article to gain 30%?