Ans. Types of Demands are :
(1) Derived demand: When a commodity cannot satisfy a particular want directly; but is demanded to produce some other product, its demand is known as a derived demand.For example, all factors of production like land, labour, raw material, machinery, etc.
(2) Direct demand: When a commodity or service satisfies human wants directly, its demand is called as direct demand.For example, clothes, notebooks, foodgrains, etc.
(3) Complementary or Joint demand: When two or more than two goods are demanded together- to satisfy a single want, they are said to have complementary or joint demand.For example, demand for car and petrol, pen and refill.
(4) Competitive demand: When two commodities are close substitutes of each other, they have a competitive demand.For example, tea and coffee.
(5) Composite demand: When a commodity can satisfy more than one want, it is known to have composite demand.For example, demand for electricity, money, water, etc.