91.
Perfect competition is a market situation in which a number of firm sell similar goods and none of these firms is in a position to influence the market price.

92.
$$\frac{{\% {\text{ Change in quantity demanded of good }}x}}{{\% {\text{ Change in the price of good }}y{\text{ }}}}$$
This formula indicates to

93.
Match the following.
List-I (Concepts) List-II (Features)
a. Utility 1. MU tends to decline as consumption of the commodity increases
b. Total utility 2. It is a want satisfying power of a good
c. Marginal utility 3. Sum total of utility derived from the consumption of all the units of a commodity
d. Law of diminishing marginal utility 4. Additional utility an account of the consumption of an additional unit of a commodity

94.
Goods 'A' and 'B' are complementary goods. The cost of resources used in the production of A decreases. As a result,

97.
Which of the following best expresses the law of diminishing marginal utility?