Solution:National income is the total value of a country's final output of all new goods and services produced in one year.Methods of measuring national income are:
1. Expenditure Method - Under this method, we es-timate the disposal of income on the purchase of final goods and services.
2. Income Method The Income Method measures national income from the side of payments made to the primary factors of production in the form of rent, wages, interest, and profit for their productive services in an accounting year.
3. Production method In this method, national in-come is measured as a flow of goods and services. This method is also called an output method.