81.
If a consumer, with a given income and price consumes three commodities x, y and z. His satisfaction will be maximum when:

85.
Which of the following statement(s) is/are not correctly?

90.
Match List-I with List-II and select the correct answer:
List-I List-II
a. Real cost 1. Aggregate of accounting costs and implicit costs
b. Money cost 2. Physical quantities of factors used in production
c. Opportunity Cost 3. Monetary expenditure on inputs
d. Economic cost 4. Sacrifice of alternative use of given resources