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Question 1 Report
(a) What is supply? [5 marks]
(b) Describe any five determinants of supply. [15marks]
(a) Supply is the quantity of a good or service that producers are willing and able to offer for sale at a given price over a given period of time. It is not the total stock in existence but the amount actually put on the market at each price; according to the law of supply, more is supplied at a higher price and less at a lower price, other things being equal.
(b) Five determinants of supply:
(Other acceptable determinants: natural factors such as weather for agricultural goods, the number of producers in the market, and producers' expectations of future prices.)
Answer Details
(a) Supply is the quantity of a good or service that producers are willing and able to offer for sale at a given price over a given period of time. It is not the total stock in existence but the amount actually put on the market at each price; according to the law of supply, more is supplied at a higher price and less at a lower price, other things being equal.
(b) Five determinants of supply:
(Other acceptable determinants: natural factors such as weather for agricultural goods, the number of producers in the market, and producers' expectations of future prices.)
Question 2 Report
(a) Define the profit of a firm [4 marks]
(b) With appropriate formula, explain the following revenue and cost concepts:
(i) total revenue (TR); [4 marks]
(ii) average revenue (AR): [4 marks]
(iii) marginal revenue (MR); [4 marks]
(iv) average fixed cost (AFC). [4 marks]
(a) Profit of a firm. Profit is the financial surplus a firm earns when its total revenue from selling output exceeds its total cost of production over a given period. In symbols, \( \text{Profit} = TR - TC \). Economists distinguish accounting profit (revenue minus explicit money costs) from economic (normal and supernormal) profit, where cost also includes the opportunity cost of the entrepreneur's own resources. Profit rewards the entrepreneur for risk-bearing and organisation.
(b) Revenue and cost concepts.
(i) Total Revenue (TR): the total money a firm receives from selling a given quantity of output. \( TR = P \times Q \), where \( P \) is price per unit and \( Q \) is quantity sold. If 100 units sell at \( \text{N}5 \) each, \( TR = 100 \times 5 = \text{N}500 \).
(ii) Average Revenue (AR): revenue earned per unit of output sold. \( AR = \dfrac{TR}{Q} = P \). AR equals the price, so the AR curve is the firm's demand curve.
(iii) Marginal Revenue (MR): the addition to total revenue from selling one extra unit of output. \( MR = \dfrac{\Delta TR}{\Delta Q} \). Under perfect competition \( MR = AR = P \); under imperfect competition \( MR < AR \).
(iv) Average Fixed Cost (AFC): fixed cost per unit of output. \( AFC = \dfrac{TFC}{Q} \), where \( TFC \) is total fixed cost. Because \( TFC \) is constant, AFC falls continuously as output rises (the fixed cost is spread over more units), so the AFC curve slopes downward throughout.
Examination reminder: always attach the correct formula to each concept and note that profit is maximised where \( MR = MC \), not where TR is simply large.
Answer Details
(a) Profit of a firm. Profit is the financial surplus a firm earns when its total revenue from selling output exceeds its total cost of production over a given period. In symbols, \( \text{Profit} = TR - TC \). Economists distinguish accounting profit (revenue minus explicit money costs) from economic (normal and supernormal) profit, where cost also includes the opportunity cost of the entrepreneur's own resources. Profit rewards the entrepreneur for risk-bearing and organisation.
(b) Revenue and cost concepts.
(i) Total Revenue (TR): the total money a firm receives from selling a given quantity of output. \( TR = P \times Q \), where \( P \) is price per unit and \( Q \) is quantity sold. If 100 units sell at \( \text{N}5 \) each, \( TR = 100 \times 5 = \text{N}500 \).
(ii) Average Revenue (AR): revenue earned per unit of output sold. \( AR = \dfrac{TR}{Q} = P \). AR equals the price, so the AR curve is the firm's demand curve.
(iii) Marginal Revenue (MR): the addition to total revenue from selling one extra unit of output. \( MR = \dfrac{\Delta TR}{\Delta Q} \). Under perfect competition \( MR = AR = P \); under imperfect competition \( MR < AR \).
(iv) Average Fixed Cost (AFC): fixed cost per unit of output. \( AFC = \dfrac{TFC}{Q} \), where \( TFC \) is total fixed cost. Because \( TFC \) is constant, AFC falls continuously as output rises (the fixed cost is spread over more units), so the AFC curve slopes downward throughout.
Examination reminder: always attach the correct formula to each concept and note that profit is maximised where \( MR = MC \), not where TR is simply large.
Question 3 Report
The demand function for a commodity is given as \(Qd = 21 - 3p\).
(a) Use the demand function to complete the table below. [6 marks]
| Price $ | 0 | 1 | 3 | 4 | 5 | 6 |
| Quantity demanded (Kg) |
(b) Draw the demand curve for the completed schedule in 1(a) (Use of graph sheet is essential) [8 marks]
(c) Outline any three factors affecting demand [6 marks]
(a) Demand schedule
Given \(Q_d = 21 - 3P\):
| Price, \(P\) ($) | 0 | 1 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Quantity demanded, \(Q_d\) (kg) | 21 | 18 | 12 | 9 | 6 | 3 |
For example:
(b) Demand curve
Plot quantity demanded on the horizontal axis and price on the vertical axis. Plot the points \((21,0)\), \((18,1)\), \((12,3)\), \((9,4)\), \((6,5)\), and \((3,6)\), and join them with a straight line labelled \(DD\).
The downward-sloping curve shows the inverse relationship between price and quantity demanded.
(c) Three factors affecting demand
Answer Details
(a) Demand schedule
Given \(Q_d = 21 - 3P\):
| Price, \(P\) ($) | 0 | 1 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Quantity demanded, \(Q_d\) (kg) | 21 | 18 | 12 | 9 | 6 | 3 |
For example:
(b) Demand curve
Plot quantity demanded on the horizontal axis and price on the vertical axis. Plot the points \((21,0)\), \((18,1)\), \((12,3)\), \((9,4)\), \((6,5)\), and \((3,6)\), and join them with a straight line labelled \(DD\).
The downward-sloping curve shows the inverse relationship between price and quantity demanded.
(c) Three factors affecting demand
Question 4 Report
Outline any five effects of high dependency ratio [20 marks]
The dependency ratio is the ratio of the dependent population (those below the working age, usually under 15, and those above it, usually over 64) to the working population (aged 15 to 64). A high dependency ratio means each worker supports many non-workers. Its effects include:
Any five, well explained, complete the answer.
Answer Details
The dependency ratio is the ratio of the dependent population (those below the working age, usually under 15, and those above it, usually over 64) to the working population (aged 15 to 64). A high dependency ratio means each worker supports many non-workers. Its effects include:
Any five, well explained, complete the answer.
Question 5 Report
Explain the following systems of agriculture as practiced in your country:
(a) subsistence farming; [4 marks]
(b) co-operative agriculture; [4 marks]
(c) plantation agriculture; [4 marks]
(d) mechanized agriculture; [4 marks]
(e) peasant farming. [4 marks]
These are the main systems under which agriculture is organised in Nigeria.
(a) Subsistence farming: production of crops and livestock mainly to feed the farmer and the household, with little or no surplus for sale. It uses simple tools (hoe, cutlass), small plots and family labour, so output and productivity are low.
(b) Co-operative agriculture: a system in which farmers voluntarily pool their resources (land, capital, labour, and inputs) and work together as a registered co-operative society. They share tools, obtain credit and improved seeds jointly, market produce together and share the proceeds, which raises their bargaining power and reduces costs.
(c) Plantation agriculture: large-scale cultivation of a single cash crop (for example oil palm, rubber, cocoa or sugar cane) on a very large estate, using heavy capital, hired labour and modern management, mainly for export or industrial processing.
(d) Mechanized agriculture: farming that relies on machines and modern equipment such as tractors, harvesters, planters and irrigation pumps rather than human or animal power. It permits large hectarage, higher output per worker and timely operations, but requires much capital.
(e) Peasant farming: small-scale farming carried out by individual local farmers on scattered small holdings, using traditional methods, family labour and simple implements, producing mainly for the family with a small surplus sold in local markets.
Examination reminder: keep subsistence, peasant and mechanized distinct: subsistence stresses the purpose (self-consumption), peasant stresses the scale and holder (small individual farmer), and mechanized stresses the method (use of machines).
Answer Details
These are the main systems under which agriculture is organised in Nigeria.
(a) Subsistence farming: production of crops and livestock mainly to feed the farmer and the household, with little or no surplus for sale. It uses simple tools (hoe, cutlass), small plots and family labour, so output and productivity are low.
(b) Co-operative agriculture: a system in which farmers voluntarily pool their resources (land, capital, labour, and inputs) and work together as a registered co-operative society. They share tools, obtain credit and improved seeds jointly, market produce together and share the proceeds, which raises their bargaining power and reduces costs.
(c) Plantation agriculture: large-scale cultivation of a single cash crop (for example oil palm, rubber, cocoa or sugar cane) on a very large estate, using heavy capital, hired labour and modern management, mainly for export or industrial processing.
(d) Mechanized agriculture: farming that relies on machines and modern equipment such as tractors, harvesters, planters and irrigation pumps rather than human or animal power. It permits large hectarage, higher output per worker and timely operations, but requires much capital.
(e) Peasant farming: small-scale farming carried out by individual local farmers on scattered small holdings, using traditional methods, family labour and simple implements, producing mainly for the family with a small surplus sold in local markets.
Examination reminder: keep subsistence, peasant and mechanized distinct: subsistence stresses the purpose (self-consumption), peasant stresses the scale and holder (small individual farmer), and mechanized stresses the method (use of machines).
Question 6 Report
(a) Define the term limited liability [4 marks]
(b) Explain any four problems of statutory public corporations in your country [16 marks]
(a) Limited liability means that the liability (financial responsibility) of an owner for the debts of a business is limited to the amount he has invested or agreed to contribute. If the business fails, the owner can lose only his investment; his personal property cannot be seized to settle the business's debts.
(b) Four problems of statutory public corporations:
(Other acceptable problems: bureaucratic red tape and slow decision-making, and the tendency toward monopoly, which removes the pressure to be efficient.)
Answer Details
(a) Limited liability means that the liability (financial responsibility) of an owner for the debts of a business is limited to the amount he has invested or agreed to contribute. If the business fails, the owner can lose only his investment; his personal property cannot be seized to settle the business's debts.
(b) Four problems of statutory public corporations:
(Other acceptable problems: bureaucratic red tape and slow decision-making, and the tendency toward monopoly, which removes the pressure to be efficient.)
Question 7 Report
(a) What is public recurrent expenditure? [5 marks]
(b) Give five reasons for the rapid increase in government expenditure in your country. [15 marks]
(a) Public recurrent expenditure. This is government spending on the day-to-day running of the state that recurs regularly and does not create a lasting physical asset. It covers items such as salaries and wages of civil servants, interest on public debt, maintenance of existing facilities, subsidies and general administration. It is contrasted with capital expenditure, which builds durable assets like roads, schools and hospitals.
(b) Reasons for the rapid increase in government expenditure in Nigeria.
Examination reminder: the question asks for five reasons, so state five clearly and explain each with a short sentence rather than merely listing.
Answer Details
(a) Public recurrent expenditure. This is government spending on the day-to-day running of the state that recurs regularly and does not create a lasting physical asset. It covers items such as salaries and wages of civil servants, interest on public debt, maintenance of existing facilities, subsidies and general administration. It is contrasted with capital expenditure, which builds durable assets like roads, schools and hospitals.
(b) Reasons for the rapid increase in government expenditure in Nigeria.
Examination reminder: the question asks for five reasons, so state five clearly and explain each with a short sentence rather than merely listing.
Question 8 Report
(a) What is a market? [4 marks]
(b) Explain the main features of a perfectly competitive market. [16 marks]
(a) A market is any arrangement, place or situation that brings buyers and sellers of a good or service into contact so that they can carry out transactions and determine a price. It need not be a physical location; contact by telephone or the internet also forms a market.
(b) Main features of a perfectly competitive market:
Because of these conditions, a single ruling price is established and each firm faces a perfectly elastic (horizontal) demand curve.
Answer Details
(a) A market is any arrangement, place or situation that brings buyers and sellers of a good or service into contact so that they can carry out transactions and determine a price. It need not be a physical location; contact by telephone or the internet also forms a market.
(b) Main features of a perfectly competitive market:
Because of these conditions, a single ruling price is established and each firm faces a perfectly elastic (horizontal) demand curve.
Question 9 Report
(a) Explain the term internal economies of scale. [4 marks]
(b) Outline any four economies of scale a firm enjoys as it grows in size. [16marks]
(a) Internal economies of scale are the cost advantages that a single firm enjoys as it expands its own scale of production, causing its average (unit) cost of production to fall. They arise from within the firm itself, not from the growth of the whole industry.
(b) Four economies of scale enjoyed as the firm grows:
(Other acceptable types: risk-bearing economies through diversifying products and markets, and research economies from funding its own research and development.)
Answer Details
(a) Internal economies of scale are the cost advantages that a single firm enjoys as it expands its own scale of production, causing its average (unit) cost of production to fall. They arise from within the firm itself, not from the growth of the whole industry.
(b) Four economies of scale enjoyed as the firm grows:
(Other acceptable types: risk-bearing economies through diversifying products and markets, and research economies from funding its own research and development.)
Question 10 Report
(a) Distinguish between a cheque and a bank note [8 marks]
(b) What are the main problems of trade by barter? [12 marks]
(a) Cheque compared with a bank note.
| Feature | Cheque | Bank note |
|---|---|---|
| Nature | A written order instructing a bank to pay a stated sum from the drawer's account | Printed paper currency issued by the Central Bank |
| Legal tender | Not legal tender; a payee may lawfully refuse it | Legal tender that must be accepted in settlement of debt |
| Issuer | Drawn by an account holder on a commercial bank | Issued solely by the Central Bank |
| General acceptability | Limited; may bounce if the account lacks funds | Generally and readily acceptable |
| Denomination | Written for any exact amount | Comes in fixed denominations |
(b) Main problems of trade by barter. Barter is the direct exchange of goods for goods without money. Its problems are:
Examination reminder: present the barter problems as the mirror-image of the functions of money, since money was invented to solve exactly these difficulties.
Answer Details
(a) Cheque compared with a bank note.
| Feature | Cheque | Bank note |
|---|---|---|
| Nature | A written order instructing a bank to pay a stated sum from the drawer's account | Printed paper currency issued by the Central Bank |
| Legal tender | Not legal tender; a payee may lawfully refuse it | Legal tender that must be accepted in settlement of debt |
| Issuer | Drawn by an account holder on a commercial bank | Issued solely by the Central Bank |
| General acceptability | Limited; may bounce if the account lacks funds | Generally and readily acceptable |
| Denomination | Written for any exact amount | Comes in fixed denominations |
(b) Main problems of trade by barter. Barter is the direct exchange of goods for goods without money. Its problems are:
Examination reminder: present the barter problems as the mirror-image of the functions of money, since money was invented to solve exactly these difficulties.
Question 11 Report
Give four reasons why the governments of West African countries have found the policy of privatization attractive. [20 marks]
Privatization is the transfer of ownership and control of government-owned enterprises to private individuals or companies. Governments of West African countries have found it attractive for the following reasons:
(Other acceptable reasons: to reduce political interference and corruption in the management of enterprises, and to deepen the capital market by increasing the number of quoted companies.)
Answer Details
Privatization is the transfer of ownership and control of government-owned enterprises to private individuals or companies. Governments of West African countries have found it attractive for the following reasons:
(Other acceptable reasons: to reduce political interference and corruption in the management of enterprises, and to deepen the capital market by increasing the number of quoted companies.)
Question 12 Report
The table below shows the budgetary allocation of a country to selected sectors of the economy in a particular year. Study the table carefully and answer the questions that follow.
| Sectors | Amount ( $ Million) |
| Education | 6,250 |
| Mining | 2,150 |
| Agriculture | 4,300 |
| Communication | 2,400 |
| Health | 2,900 |
(a) Present the above information contained in the table in the form of a pie chart. (Show your workings clearly). [12 marks]
(b) Distinguish between a budget surplus and a budget deficit. [8 marks]
(a) Pie chart of the budgetary allocation
First, calculate the total allocation:
\[\$6,250+\$2,150+\$4,300+\$2,400+\$2,900=\$18,000\text{ million}\]
The angle for each sector is calculated as:
\[\text{Sector angle}=\frac{\text{Sector allocation}}{\text{Total allocation}}\times360^\circ\]
| Sector | Allocation ($ million) | Working | Angle |
|---|---|---|---|
| Education | 6,250 | \(\frac{6,250}{18,000}\times360^\circ\) | 125° |
| Mining | 2,150 | \(\frac{2,150}{18,000}\times360^\circ\) | 43° |
| Agriculture | 4,300 | \(\frac{4,300}{18,000}\times360^\circ\) | 86° |
| Communication | 2,400 | \(\frac{2,400}{18,000}\times360^\circ\) | 48° |
| Health | 2,900 | \(\frac{2,900}{18,000}\times360^\circ\) | 58° |
| Total | 18,000 | 360° |
Using the calculated angles, the pie chart is:
(b) A budget surplus occurs when the government’s planned revenue is greater than its planned expenditure. A budget deficit occurs when the government’s planned expenditure is greater than its planned revenue.
Answer Details
(a) Pie chart of the budgetary allocation
First, calculate the total allocation:
\[\$6,250+\$2,150+\$4,300+\$2,400+\$2,900=\$18,000\text{ million}\]
The angle for each sector is calculated as:
\[\text{Sector angle}=\frac{\text{Sector allocation}}{\text{Total allocation}}\times360^\circ\]
| Sector | Allocation ($ million) | Working | Angle |
|---|---|---|---|
| Education | 6,250 | \(\frac{6,250}{18,000}\times360^\circ\) | 125° |
| Mining | 2,150 | \(\frac{2,150}{18,000}\times360^\circ\) | 43° |
| Agriculture | 4,300 | \(\frac{4,300}{18,000}\times360^\circ\) | 86° |
| Communication | 2,400 | \(\frac{2,400}{18,000}\times360^\circ\) | 48° |
| Health | 2,900 | \(\frac{2,900}{18,000}\times360^\circ\) | 58° |
| Total | 18,000 | 360° |
Using the calculated angles, the pie chart is:
(b) A budget surplus occurs when the government’s planned revenue is greater than its planned expenditure. A budget deficit occurs when the government’s planned expenditure is greater than its planned revenue.
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