The Theory of Price Determination: JAMB Economics Questions, Answers & Notes

What The Theory of Price Determination covers in the JAMB Economics syllabus

In a free market, price is determined where demand and supply meet — the equilibrium price, at which quantity demanded equals quantity supplied and the market clears. Above equilibrium there is a surplus (excess supply, pushing price down); below it a shortage (excess demand, pushing price up). Shifts change the equilibrium: rising demand raises price and quantity; rising supply lowers price but raises quantity. The price mechanism uses changing prices to allocate resources and signal producers. Governments may impose price controls: a price ceiling (legal maximum, below equilibrium) causes shortages; a price floor (legal minimum, above equilibrium) causes surpluses. Taxes raise, and subsidies lower, the price.

For The Theory of Price Determination, JAMB expects you to be able to:

• Explain how demand and supply determine equilibrium price and quantity
• Analyse surpluses, shortages and shifts in demand/supply
• Explain price controls (ceilings and floors) and the price mechanism

Key facts & revision notes: The Theory of Price Determination

These are the recurring points our The Theory of Price Determination questions test — revise them until each feels automatic, then practise the questions above to lock them in.

• Market price is set by the interaction of demand and supply.
• Equilibrium price is where quantity demanded equals quantity supplied.
• At equilibrium, the market clears — no surplus or shortage.
• Above equilibrium, quantity supplied exceeds quantity demanded — a surplus.
• Below equilibrium, quantity demanded exceeds quantity supplied — a shortage.
• A price ceiling is a legal maximum price, set below equilibrium (e.g.
• A price floor is a legal minimum price, set above equilibrium (e.g.
• A binding price ceiling keeps price low, causing quantity demanded to exceed supply — a shortage.
• A binding price floor keeps price high, causing quantity supplied to exceed demand — a surplus.
• An increase in demand (supply unchanged) raises equilibrium price and quantity.
• An increase in supply (demand unchanged) lowers equilibrium price and raises quantity.
• The price mechanism allocates resources through changing prices in a free market.
• A higher price signals producers to increase supply.
• At the equilibrium price, the market clears (all that is supplied is bought).
• A tax reduces supply, which tends to raise the equilibrium price paid by consumers.
• A subsidy increases supply, which tends to lower the equilibrium price to consumers.
• If both demand and supply rise, equilibrium quantity rises (the price change depends on the sizes).
• Fixing prices (ceilings or floors) is price control — government intervention in the market.
• The demand and supply curves cross at the equilibrium point (equilibrium price and quantity).
• A shortage (excess demand) pushes the price upward toward equilibrium.
• This is the theory of price determination.
• Plans match only at the equilibrium price.
• At equilibrium the two quantities are equal.
• Above equilibrium, supply exceeds demand — a surplus.

Worked examples

Three The Theory of Price Determination questions with the answer and a short explanation, so you can see how the topic is set before you practise the full set.

How The Theory of Price Determination is tested in JAMB Economics

Our The Theory of Price Determination bank holds 40 questions (1 easy, 19 medium, 20 hard). JAMB Economics typically returns to The Theory of Price Determination year after year, so steady practice on this topic is high-value revision. Questions are multiple-choice with four options, and at UTME pace you get roughly 40 seconds each — which is why timed practice matters.

How to answer The Theory of Price Determination questions

Work the stem first and predict the answer before you look at the options; then eliminate the ones that contradict the key facts above. Watch for “which is not…”, “all of the above” and “except” style stems, which are where rushed candidates lose easy marks on The Theory of Price Determination. If a calculation or a precise definition is involved, work it from first principles rather than guessing from a half-remembered rule. When two options look right, re-read the stem for the qualifier that separates them — JAMB rarely repeats an option by accident. If you are still unsure, eliminate the two weakest choices to lift your odds, flag the question, and move on; never burn a full minute on one Economics item when the exam gives you about forty seconds each. Then come back to flagged questions with whatever time remains. The single most reliable way to get faster at The Theory of Price Determination is repeated timed practice, so use the button above until the recurring patterns feel automatic.

Common mistakes to avoid in The Theory of Price Determination

The errors that cost marks on The Theory of Price Determination are usually careless rather than conceptual: misreading a negative stem, confusing two similar terms, or rushing a definition you actually know. Candidates also over-rely on “expo” and last-minute cramming instead of understanding the topic — which fails the moment JAMB rephrases a familiar idea. Treat every option as a claim to be checked against the facts above, keep your working tidy for any calculation, and don’t change a considered answer on a hunch. Above all, revise The Theory of Price Determination actively by answering questions, not just by re-reading notes — recall under time is what the exam rewards.

Frequently asked questions

Is The Theory of Price Determination part of the JAMB Economics syllabus?

Yes. The Theory of Price Determination is a recognised topic in the JAMB Economics syllabus, covering explain how demand and supply determine equilibrium price and quantity. You should be able to recall its key facts and apply them to multiple-choice questions.

How many The Theory of Price Determination questions can I practise on Belmadeng?

There are 40 original, JAMB-standard The Theory of Price Determination questions in our free bank, each with the correct answer and a worked explanation. You can practise them untimed or as a timed test.

What are the most important points to know about The Theory of Price Determination?

In a free market, price is determined where demand and supply meet — the equilibrium price, at which quantity demanded equals quantity supplied and the market clears. Above equilibrium there is a surplus (excess supply, pushing price down); below it a shortage (excess demand, pushing price up). Shif…

How do I answer The Theory of Price Determination questions quickly in JAMB?

Read the stem carefully, eliminate clearly wrong options, and match the remaining choices to the key facts for The Theory of Price Determination. Practising timed The Theory of Price Determination questions builds the speed you need for UTME's pace of about 40 seconds per question.

Are these JAMB Economics The Theory of Price Determination questions past questions or original?

They are original questions written to JAMB (UTME) standard and mapped to the official syllabus — not reproduced past papers. This keeps them legal to use freely while closely mirroring how the real exam tests the topic.

Where can I practise The Theory of Price Determination questions free without signing up?

Right here — tap “Start The Theory of Price Determination practice” on this page to begin instantly. Belmadeng's CBT practice is completely free and needs no sign-up, download or subscription.

About these questions: original, JAMB-standard items written from the official UTME Economics syllabus (last reviewed 2026-09-18). Belmadeng is an independent study platform and is not affiliated with JAMB. Spotted an error? Use the report link.