Free Year 11 The Economic Problem, Opportunity Cost and Economic Systems
HSC/VCE-style study notes on scarcity, the economic problem and the three questions every economy must answer. Explains opportunity cost using a production possibility frontier (PPF) schedule, shows what points inside, on and outside the frontier mean, and compares market, planned and mixed economic systems. Includes a worked PPF example and a self-check with answers.
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- Year
- Year 11
- Subject
- Economics
- Topic
- Introduction to Economics
- Difficulty
- Level 2 · Standard
- Estimated time
- 25 minutes
- Curriculum
- Australian Curriculum
- Answers
- Not applicable
- Format
- PDF (A4) + print
Students will practise
- explaining scarcity, choice and the economic problem
- identifying the factors of production and their returns
- calculating opportunity cost from a production possibility schedule
- comparing market, planned and mixed economic systems
Curriculum: Australian Curriculum. We show specific outcome codes only where they have been verified against the official curriculum document.
What's next?
Completed: The Economic Problem, Opportunity Cost and Economic Systems
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How to use this study guide
- Read it together first, pausing at each worked example to try the step before reading the answer.
- Attempt the "Check yourself" questions at the end without looking back.
- Then practise with a worksheet from the pathway above and finish with the topic test.
Common questions
Who is this study guide for?
Year 11 students (typically ages 16–17) working on introduction to economics. It is pitched at level 2 · standard.
Are the answers included?
This is a study guide, so there is no separate answer sheet; the 'Check yourself' questions include answers.
How long does it take?
About 25 minutes. Short, regular sessions work best: two or three a week beats one long one.
Do I need to sign up to download?
No. Click Download Free PDF and it opens immediately. It is free for personal, classroom and homeschool use.
What should we do next?
Move on to Markets.
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Year 11 · Economics · Introduction to Economics
The Economic Problem, Opportunity Cost and Economic Systems
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What you need to know
Economics studies how people and societies use scarce resources to satisfy their needs and wants. Needs are the things required to survive (food, water, shelter); wants are everything else we would like, and they are effectively unlimited. Resources, however, are limited. This gap between unlimited wants and limited resources is scarcity, and it forces every individual, business and government to make choices. The economic problem is therefore: how should scarce resources be allocated to satisfy as many wants as possible? Every choice has an opportunity cost: the value of the next best alternative given up when a decision is made.
| Factor of production | What it is | Return earned | Example |
|---|---|---|---|
| Land | All natural resources | Rent | Farmland, minerals, fisheries |
| Labour | Human effort, physical and mental | Wages | A nurse, a bricklayer |
| Capital | Goods made to produce other goods | Interest | Machinery, factories, software |
| Enterprise | Organising the other factors and taking the risk | Profit | A founder starting a business |
Because resources are scarce, every economy must answer three questions. What to produce? Which goods and services, and how much of each. How to produce? Which resources and methods, for example labour-intensive or capital-intensive production. For whom to produce? How the output is distributed, which is determined by the distribution of income. Economies also decide how much to consume now versus how much to save and invest in capital goods, which affects future growth.
A production possibility frontier shows the maximum combinations of two goods an economy can produce when all resources are fully and efficiently used, with fixed technology. It makes scarcity, choice and opportunity cost visible. The frontier shifts outwards (economic growth) when the economy gains more resources, better-quality resources through education and training, or improved technology; it shifts inwards when resources are destroyed, for example by a natural disaster. Choosing more capital goods now means fewer consumer goods today but a larger outward shift in future. The schedule below is for a fictional economy that produces only tractors and loaves of bread.
| Combination | Tractors | Bread (thousand loaves) | Opportunity cost of the extra 10 tractors |
|---|---|---|---|
| A | 0 | 100 | – |
| B | 10 | 90 | 10 thousand loaves (1 per tractor) |
| C | 20 | 70 | 20 thousand loaves (2 per tractor) |
| D | 30 | 40 | 30 thousand loaves (3 per tractor) |
| E | 40 | 0 | 40 thousand loaves (4 per tractor) |
Reading the PPF schedule
- Moving from A to B: tractors rise from 0 to 10 and bread falls from 100 to 90. The opportunity cost of the first 10 tractors is 100 − 90 = 10 thousand loaves, or 1 thousand loaves per tractor.
- Moving from C to D: tractors rise from 20 to 30 and bread falls from 70 to 40. The opportunity cost is 70 − 40 = 30 thousand loaves, or 3 thousand loaves per tractor.
- The opportunity cost rises with each step (1, 2, 3, then 4 thousand loaves per tractor). This is increasing opportunity cost: resources are not equally suited to both uses, so as more tractors are made the economy must divert resources that were better at baking bread. It is why the PPF is drawn bowed outwards (concave to the origin).
- A point inside the frontier, such as 15 tractors and 50 thousand loaves, is attainable but inefficient: some resources are unemployed or badly used.
- A point outside the frontier, such as 30 tractors and 80 thousand loaves, is currently unattainable. It becomes possible only if the frontier shifts outwards through economic growth.
| Economic system | Who answers the three questions | Strengths | Weaknesses |
|---|---|---|---|
| Market (capitalist) economy | Consumers and producers through the price mechanism; private ownership of resources | Efficient allocation, consumer choice, incentives to innovate | Inequality, market failure, boom and bust cycles |
| Planned (command) economy | Central government planners; public ownership of resources | Can direct resources to national priorities and reduce inequality | Poor incentives, shortages and surpluses, limited choice |
| Mixed economy | Mostly markets, with government intervening to correct failures and provide public goods | Combines market efficiency with social goals | Debate over how much intervention is appropriate |
Australia is a mixed market economy. Most decisions about what, how and for whom are made by consumers and businesses responding to prices, but governments at all levels also play large roles: providing public goods and services such as defence, roads and public education; regulating markets through bodies such as the ACCC; redistributing income through taxation and welfare payments; and managing the economy through the federal budget and, via the Reserve Bank of Australia (RBA), monetary policy. The balance between market and government is a central debate in economic policy.
Check yourself
- Define scarcity in one sentence.
- Which factor of production earns interest as its return?
- Using the tractors and bread schedule, what is the opportunity cost of moving from combination C to D?
- What does a point inside the PPF indicate about the economy?
- Name two things that could shift a PPF outwards.
- In which type of economic system do central planners decide what is produced?
Answers: 1. Scarcity is the situation where wants are unlimited but the resources available to satisfy them are limited. 2. Capital. 3. 30 thousand loaves of bread (70 − 40), or 3 thousand loaves per tractor. 4. Resources are unemployed or used inefficiently; the economy could produce more of both goods. 5. More or better resources (population growth, education, new capital) or improved technology (any two). 6. A planned (command) economy.
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About this resource
- Created by
- Success Tutoring
- Last reviewed
- 1 October 2026
- How it was made
- Written by our team
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