WAEC Past Questions

WAEC Economics 2021
Questions & Answers

20 questions · Correct answers highlighted · 20 with explanations

Explanations reviewed August 2026

This assessment centers on essential microeconomic and macroeconomic theories, examining how individuals, firms, and governments interact within an economy. Key topics highlighted throughout the questions include elasticity measures, the laws of production and cost, population dynamics, and methods of controlling inflation. Additional emphasis is placed on national income aggregates and market structures. Make sure to carefully study the detailed explanations for each question to strengthen your conceptual foundation rather than relying on rote memorization.

20 Total Questions
2021 Exam Year
20 With Explanations

Topics in this paper

Demand and Supply (10) Cost and Production Theory (6) Economic Systems and Planning (3) Market Structures (3) Public Finance and Taxation (3) Population and Labor (3) National Income and Fiscal Policy (3) Elasticity Concepts (2) Economic Development and Industrialization (2) Monetary Policy and Banking (2) Inflation and Money (2) Consumer Theory (1)
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1
Question 1 of 20
WAEC · Economics · 2021

The study of economics is important to every society because it

A. enables individuals to satisfy all their wants.
B. helps in the utilization of scarce resources.
C. helps producers to know what to produce.
D. restores equilibrium between producers and consumers.
Explanation

Students might select options A, C, or D by misinterpreting the primary economic challenge of unlimited wants versus limited means. Economics is essential because human wants are unlimited while available resources are strictly limited, requiring societies to make choices regarding resource allocation. This focus on managing scarcity helps ensure that limited resources are utilized efficiently. Common mistake: Believing economics can entirely eliminate scarcity and satisfy all human wants.

2
Question 2 of 20
WAEC · Economics · 2021

A consumer with $10 needs a dress, a pair of shoes, a handbag and jewellery costing $20, $10, $7 and $3 respectively. The opportunity cost of buying the pair of shoes is the

A. dress.
B. jewellery.
C. handbag and jewellery.
D. dress and jewellery.
Explanation

Distractor check: A student might mistakenly select option A, the dress, assuming it represents the primary alternative purchase, or option D by pairing the dress with jewelry. Reasoning to the answer: Given a total budget of ten dollars, purchasing the pair of shoes requires sacrificing other options whose combined costs equal the expenditure. Since the twenty-dollar dress exceeds the entire budget, the choices are limited to the handbag at seven dollars and the jewelry at three dollars. Giving up both items perfectly accounts for the ten-dollar cost of the shoes, making this combined set the true forgone alternative. Common mistake: Forgetting that opportunity cost must fit within the total available financial limit.

3
Question 3 of 20
WAEC · Economics · 2021

The distinguishing function of an entrepreneur is

A. planning.
B. control.
C. risk-bearing.
D. management.
Explanation

Distractor check: Students may mistakenly choose option D because managers oversee business operations daily, confusing administrative tasks with the unique core responsibility of business leadership. Reasoning to the answer: While supervisors and administrators handle routine organizational tasks, the defining element of an enterprise creator involves absorbing the uncertainties and financial hazards of the venture. This unique individual brings together various production factors aiming for financial gain, setting them apart from ordinary workers or hired managers. Common mistake: Confusing the daily management of a firm with the ultimate financial risk-bearing function.

4
Question 4 of 20
WAEC · Economics · 2021

When a commodity market operates without government interference, commodities are distributed through

A. government distribution agencies.
B. the operation of price mechanism.
C. a central planning committee.
D. retailers only.
Explanation

Distractor check: A student might wrongly pick option A or C, assuming that goods require formal administration by state committees or official distribution bodies to reach consumers properly. Reasoning to the answer: Unregulated markets rely entirely on the interaction of buyers and sellers to allocate resources naturally. Through the fluctuation of costs driven by supply and demand forces, commodities are distributed, produced, and consumed without requiring any centralized authority or administrative planning. Common mistake: Overlooking how market forces autonomously allocate goods without state intervention.

5
Question 5 of 20
WAEC · Economics · 2021

One way of obtaining the median of a given data is to

A. sum the value and divide by the number of items.
B. arrange the data in ascending order and subtract each item from the mean.
C. arrange the data in descending order and add each item to the least.
D. arrange the data in either ascending or descending order and find what item divides the set in two equal parts.
Explanation

Distractor check: A student might select option A, confusing the median with the calculation for the arithmetic mean. Reasoning to the answer: Finding the exact middle value of a dataset requires organizing the figures in either ascending or descending sequence first. Once sorted, the specific value that splits the complete set into two identically sized halves represents the median. Common mistake: Failing to sort the data numerically before attempting to find the middle position.

6
Question 6 of 20
WAEC · Economics · 2021

An increase in rice harvest, all things being equal, may cause

A. price to increase substantially.
B. price to fall substantially.
C. demand to fall substantially.
D. farmer's incomes to be more than doubled.
Explanation

Distractor check: A student might incorrectly choose option A, assuming that a larger harvest causes prices to rise rather than fall. Reasoning to the answer: A greater volume of harvested rice creates an expansion in market supply, moving the supply curve toward the right. Provided that consumer demand remains unchanged, this surplus in availability drives the equilibrium price down significantly. Common mistake: Forgetting the inverse relationship between a surge in supply and the resulting market price.

7
Question 7 of 20
WAEC · Economics · 2021

The demand for wood and labour is an example of

A. effective demand.
B. complementary demand.
C. derived demand.
D. competitive demand.
Explanation

Distractor check: A student might lean toward option B, confusing the joint need for timber and workers with goods that are consumed together like cameras and film. Reasoning to the answer: Timber and workers are not demanded for their own direct consumption, but rather because they are necessary to create a completely different final product, such as furniture. This means their requirement stems directly from the market demand for finished goods, establishing it as a classic case of derived demand. Common mistake: Failing to distinguish between goods demanded for final use and inputs required solely because of a finished product.

8
Question 8 of 20
WAEC · Economics · 2021

What will be the reaction of consumers in a market if there is a fall in the price of the substitute of commodity X?

A. Price of commodity X will increase.
B. Demand for the substitute of commodity X will decrease.
C. Demand for commodity X will decrease.
D. Supply of both commodity X and its substitute will increase.
Explanation

Distractor check: A student might select option B, thinking the substitute's own demand drops when its price falls, or choose option A by misinterpreting how market prices adjust. Reasoning to the answer: When the price of a substitute for commodity X drops, consumers naturally increase their purchases of that substitute because it becomes more affordable. Consequently, buyers switch away from commodity X, causing the market demand for commodity X to experience a decline as its demand curve shifts leftward. Common mistake: Confusing the direction of consumer substitution when a competing product becomes cheaper.

9
Question 9 of 20
WAEC · Economics · 2021

An increase in market supply is caused by the following factors except

A. an improvement in innovation and technology.
B. an increase in the price of the commodity.
C. a reduction in the cost of raw materials.
D. a favourable weather condition.
Explanation

Distractor check: A student might mistakenly select option C or D, thinking they represent exceptions rather than actual shifts in supply. Reasoning to the answer: An increase in the price of the commodity itself does not shift the overall supply curve; instead, it triggers a movement along the existing curve, resulting only in a change in the quantity supplied. In contrast, technological improvements, lower raw material expenses, and favorable weather conditions shift the entire supply curve outward. Common mistake: Confusing a movement along a supply curve caused by price with a shift in the supply curve caused by external factors.

10
Question 10 of 20
WAEC · Economics · 2021

The coefficient of price elasticity of supply of land is usually

A. one.
B. greater than one.
C. zero.
D. less than one.
Explanation

Distractor check: A student might guess option B or D, assuming land supply responds somewhat to monetary incentives. Reasoning to the answer: The total quantity of land available is physically fixed, particularly in the short run, meaning alterations in price cannot change the amount available. Because price fluctuations fail to alter the available quantity, the resulting elasticity of supply equals zero. Common mistake: Assuming that natural resources like land possess elastic supply schedules similar to manufactured goods.

11
Question 11 of 20
WAEC · Economics · 2021

The price of soap rose from $1 to $20, causing a trader to increase her supply from 50 to 120 boxes per week. This makes supply

A. unitary elastic.
B. perfectly inelastic.
C. fairly elastic.
D. inelastic.
Explanation

Distractor check: A student might select option C or A, guessing elasticity values without calculating the precise percentage changes. Reasoning to the answer: The price change from one dollar to twenty dollars represents a massive percentage increase of nineteen hundred percent, while the quantity supplied moving from fifty to one hundred twenty boxes reflects a one hundred forty percent increase. Dividing the percentage change in quantity by the percentage change in price yields an elasticity coefficient significantly below one, proving that supply is inelastic. Common mistake: Incorrectly computing percentage changes in price and quantity during elasticity calculations.

12
Question 12 of 20
WAEC · Economics · 2021

A leftward shift in the supply curve for a commodity indicates

A. an increase in quantity supplied.
B. a decrease in supply.
C. a reduction in quantity supplied.
D. an increase in supply.
Explanation

Distractor check: A student might confuse this with option C, mixing up a shift of the entire curve with a movement along the curve representing quantity changes. Reasoning to the answer: A shift of the supply curve toward the left signifies that producers are offering a lower volume of goods at every single price point, which represents an overall decrease in supply typically triggered by rising production costs. Common mistake: Failing to separate a shift in the entire supply curve from changes in the quantity supplied.

13
Question 13 of 20
WAEC · Economics · 2021

Market supply may increase if there is an increase in the

A. price of the product.
B. prices of factors of production.
C. tax paid on raw materials.
D. subsidies on raw materials.
Explanation

Distractor check: A student might pick option B or C, thinking that higher factor costs or input taxes stimulate production. Reasoning to the answer: Government subsidies granted for raw materials reduce the overall expenses incurred during production, making it cheaper for firms to manufacture goods. This cost reduction shifts the supply curve outward to the right, leading to an increase in overall market supply. Common mistake: Confusing taxes or rising costs, which restrict supply, with subsidies, which expand it.

14
Question 14 of 20
WAEC · Economics · 2021

Governments can increase farmers' incomes by

A. fixing maximum prices.
B. fixing minimum prices.
C. encouraging them to produce surplus output.
D. increasing taxes on inputs.
Explanation

Distractor check: A student might select option A, confusing price ceilings with support mechanisms designed to help producers. Reasoning to the answer: Establishing a legal minimum price set above the market equilibrium guarantees that agricultural producers receive a higher and more secure rate of return for their crops. This legislative floor prevents prices from dropping too low, thereby boosting farm incomes. Common mistake: Confusing price floors, which protect producers, with price ceilings, which protect consumers.

15
Question 15 of 20
WAEC · Economics · 2021

When market supply increases, the equilibrium price

A. rises and quantity falls.
B. falls and quantity rises.
C. and quantity increase.
D. and quantity fall.
Explanation

Distractor check: A student might choose option A or D, incorrectly assuming that greater supply drives prices upward. Reasoning to the answer: An expansion in market supply shifts the supply curve toward the right, creating a surplus at the original price level. As competition among sellers intensifies to clear this excess, the equilibrium price drops while the total quantity traded in the market rises. Common mistake: Forgetting that an outward shift in supply lowers prices while increasing transaction volume.

16
Question 16 of 20
WAEC · Economics · 2021

The supply of mangoes is represented as P = 0.3Q, where P is the price ($) and Q is the quantity. What is P when Q is 50?

A. $1.50
B. $15.00
C. $150.00
D. $166.67
Explanation

Distractor check: A student might select option C or D by incorrectly performing division instead of multiplication using the given linear equation. Reasoning to the answer: The problem provides the direct functional relationship where price equals zero point three multiplied by the quantity. Substituting the given quantity of fifty into the expression yields zero point three times fifty, which calculates directly to fifteen dollars. Common mistake: Dividing the coefficient by the quantity instead of multiplying them together.

17
Question 17 of 20
WAEC · Economics · 2021

The output of an extra unit of an input is referred to as

A. output of the input.
B. marginal product of the input.
C. average product of the input.
D. utility of the input employed.
Explanation

Distractor check: A student might select option C, confusing the return on an extra input unit with the overall average output per unit. Reasoning to the answer: The extra output generated by bringing one more unit of an input into the production process, while keeping all other factors constant, is specifically designated as the marginal product. Common mistake: Confusing marginal product with average product calculations.

18
Question 18 of 20
WAEC · Economics · 2021

The law of diminishing returns is applicable to the

A. fixed inputs of production.
B. variable factors of production.
C. plants and machinery of the firm.
D. equipment and other capital.
Explanation

Distractor check: A student might select option A or C, mistakenly thinking the rule applies to permanent structures or unvarying resources. Reasoning to the answer: The principle of diminishing returns describes what happens when successive units of a variable input are added to a set of fixed inputs. Eventually, each additional variable unit contributes a smaller increment to total output, making the rule specifically applicable to variable factors of production. Common mistake: Assuming diminishing returns apply equally to fixed plant assets rather than variable inputs.

19
Question 19 of 20
WAEC · Economics · 2021

A firm incurred the following costs in production. Use the information in the table to answer the question below. Output (bags of rice) 0 10 20 30 40 50 60 Total Cost ($) 100 200 300 380 440 520 600 The fixed cost of production is

A. $100.
B. $200.
C. $300.
D. $600.
Explanation

Distractor check: A student might select option B by misreading the cost figures associated with higher output levels in the schedule. Reasoning to the answer: Fixed costs remain entirely unchanged regardless of how much output the firm produces. Looking at the cost table, the total cost incurred when production is zero equals one hundred dollars, which represents the fixed cost since no variable expenses exist at that point. Common mistake: Failing to look at zero output to identify fixed costs.

20
Question 20 of 20
WAEC · Economics · 2021

A firm incurred the following costs in production. Use the information in the table to answer the question below. Output (bags of rice) 0 10 20 30 40 50 60 Total Cost ($) 100 200 300 380 440 520 600 The average cost of producing 40 bags of rice is

A. $10.
B. $11.
C. $60.
D. $80.
Explanation

Distractor check: A student might select option C or D by misreading the table or multiplying instead of dividing total costs by output. Reasoning to the answer: Average cost is determined by dividing the total cost of production by the corresponding output level. For forty bags of rice, the total cost listed is four-hundred-forty dollars; dividing this figure by forty yields an average cost of eleven dollars per bag. Common mistake: Multiplying output by total cost instead of dividing.

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