Class 12 Economics ‒ Chapter 1: Introduction
What is Economics?
Economics is the study of how people and societies use limited resources to satisfy unlimited wants.
It is about making choices because we can t have everything.
Example: If you have 100, you must choose between buying a book or eating out. You can t do
both ̶ that s economics in action.
Central Problems of an Economy
Every economy faces three main problems because of limited resources:
1. What to Produce? ‒ What goods should be produced and how much.
2. How to Produce? ‒ Which method to use: labour-intensive or capital-intensive.
3. For Whom to Produce? ‒ Who will receive the goods ̶ rich, poor, or both?
Basic Economic Problem: Scarcity
Scarcity means resources like land, labour, and capital are limited but human wants are unlimited.
Because of scarcity, choices must be made.
Problem of Choice
Choosing one thing means giving up another ̶ this brings the concept of opportunity cost.
Example: If a farmer grows wheat, he can t grow rice on the same land. The rice is the
opportunity cost of producing wheat.
Production Possibility Frontier (PPF)
The PPF shows the maximum combinations of two goods an economy can produce using all
resources efficiently.
Combination Good X (units) Good Y (units)
A 0 15
B 1 14
C 2 12
D 3 9
E 4 5
F 5 0
The PPF slopes downward, showing that to produce more of one good, we must give up some of
the other.
伀 爀 椀 ost and PPF
Moving along the PPF shows opportunity cost. Example: Moving from B to C means 2 units of Y
are sacrificed for 1 unit of X.
Opportunity Cost = What you give up / What you gain
Shape of PPF: Concave to Origin
What is Economics?
Economics is the study of how people and societies use limited resources to satisfy unlimited wants.
It is about making choices because we can t have everything.
Example: If you have 100, you must choose between buying a book or eating out. You can t do
both ̶ that s economics in action.
Central Problems of an Economy
Every economy faces three main problems because of limited resources:
1. What to Produce? ‒ What goods should be produced and how much.
2. How to Produce? ‒ Which method to use: labour-intensive or capital-intensive.
3. For Whom to Produce? ‒ Who will receive the goods ̶ rich, poor, or both?
Basic Economic Problem: Scarcity
Scarcity means resources like land, labour, and capital are limited but human wants are unlimited.
Because of scarcity, choices must be made.
Problem of Choice
Choosing one thing means giving up another ̶ this brings the concept of opportunity cost.
Example: If a farmer grows wheat, he can t grow rice on the same land. The rice is the
opportunity cost of producing wheat.
Production Possibility Frontier (PPF)
The PPF shows the maximum combinations of two goods an economy can produce using all
resources efficiently.
Combination Good X (units) Good Y (units)
A 0 15
B 1 14
C 2 12
D 3 9
E 4 5
F 5 0
The PPF slopes downward, showing that to produce more of one good, we must give up some of
the other.
伀 爀 椀 ost and PPF
Moving along the PPF shows opportunity cost. Example: Moving from B to C means 2 units of Y
are sacrificed for 1 unit of X.
Opportunity Cost = What you give up / What you gain
Shape of PPF: Concave to Origin
