If the budget on education is $50 m out of an annual national budget of $300 m. The sector of a pie chart representing education is 

Price elasticity of demand is the responsiveness of quantity demanded to a change in

When total revenue increases as price falls, the coefficient of price elasticity of demand is 

If the quantity demanded of rice de- creased from 150 bags to 100 bags, the percentage change in quantity demanded is

The law of demand will not hold when