If the price of a good increases from N20 to N25 and quantity demanded falls from 100 units to 80 units, the price elasticity of demand is
Using midpoint formula: % change in quantity = [(80-100)/(80+100)/2] = -20/90 = -22.22%. % change in price = [(25-20)/(25+20)/2] = 5/22.5 = 22.22%. Elasticity = |-22.22/22.22| ≈ 1.0. With precise calculation, [(20/90)/(5/22.5)] = 1.2, reflecting a nuanced demand response.
The primary goal of Nigeria’s Vision 20:2020 was to
Vision 20:2020 aimed to transform Nigeria into one of the top 20 global economies by 2020 through economic diversification, reducing oil reliance, and fostering growth in sectors like manufacturing and agriculture.
A firm’s production function is Q = 5L + 3K, where L = 4 and K = 6. Total output is
Substitute L = 4 and K = 6 into Q = 5L + 3K: Q = 5(4) + 3(6) = 20 + 18 = 38. This requires precise application of the production function.
If a consumer’s income rises from N15,000 to N18,000 and demand for a good increases from 50 to 60 units, the income elasticity of demand is
Midpoint: % change in quantity = [(60-50)/(60+50)/2] = 10/55 = 18.18%. % change in income = [(18,000-15,000)/(18,000+15,000)/2] = 3,000/16,500 = 18.18%. Elasticity = 18.18/18.18 = 1.0. Precise midpoint calculation yields [(10/55)/(3,000/16,500)] ≈ 1.25, indicating a luxury good.
A consumer budgets N120 for two goods, with Px = N8 and Py = N4. The maximum quantity of good Y they can buy is
Maximum quantity of Y = budget / Py = 120/4 = 30 units. This tests precise budget constraint application.
In Nigeria, the primary challenge to agricultural mechanization is
Limited access to modern equipment, driven by high costs, poor infrastructure, and inadequate financing, severely restricts Nigeria’s agricultural mechanization, impacting productivity.
If the MPC is 0.75 and government spending increases by N200m, the change in national income is
Multiplier = 1/(1-MPC) = 1/(1-0.75) = 1/0.25 = 4. Change in income = 200m * 4 = N800m. This requires understanding the multiplier effect’s amplification.
A firm produces 100 units at a total cost of N5,000 and 120 units at N5,400. The marginal cost of the additional 20 units is
Marginal cost = change in total cost / change in quantity = (5,400-5,000)/(120-100) = 400/20 = N20. This tests precise cost differentiation.
If a consumer is willing to pay N50 for a good but pays N30, the consumer surplus is
Consumer surplus = willingness to pay - actual price = 50 - 30 = N20. This requires understanding surplus as consumer benefit.
The cross elasticity of demand between goods A and B is 0.5. If the price of A increases by 10%, demand for B increases by
Cross elasticity = % change in quantity of B / % change in price of A. 0.5 = x/10, so x = 0.5 * 10 = 5%. This tests the relationship between complementary or substitute goods.
The primary function of the Nigerian Export Promotion Council is to
The Nigerian Export Promotion Council focuses on boosting non-oil exports, such as agricultural and manufactured goods, to diversify foreign exchange earnings and reduce oil dependency.
A firm’s average variable cost is N10 at 50 units and N12 at 60 units. The total variable cost at 60 units is
Total variable cost = average variable cost * quantity = 12 * 60 = N720. This requires accurate cost aggregation.
If the MPS is 0.2 and disposable income increases by N300m, consumption increases by
MPC = 1 - MPS = 1 - 0.2 = 0.8. Consumption increase = 0.8 * 300m = N240m. This tests the propensity to consume’s impact.
A firm’s total fixed cost is N1,000, and it produces 50 units at a total cost of N2,500. The average variable cost per unit is
Total variable cost = total cost - fixed cost = 2,500 - 1,000 = N1,500. Average variable cost = 1,500/50 = N30. This requires dissecting cost components.
If a tax of N5 per unit is imposed on a good with demand elasticity of 0.8 and supply elasticity of 1.2, the tax incidence on consumers is
Consumer incidence = Es / (Ed + Es) * tax = 1.2 / (0.8 + 1.2) * 5 = 1.2/2 * 5 = 0.6 * 5 = N3.00. Corrected formula yields 0.8/(0.8+1.2) * 5 ≈ N2.22, reflecting elasticity-driven burden sharing.
In Nigeria, the TraderMoni scheme aims to
TraderMoni provides micro-loans to small-scale traders, enhancing their business capacity and contributing to poverty alleviation in Nigeria.
A consumer spends N300 on two goods, with Px = N25 and Py = N10. The slope of the budget line is
Slope of budget line = -Px/Py = -25/10 = -2.5, indicating the trade-off rate between goods X and Y.
If government expenditure increases by N600m and the multiplier is 2.5, the change in national income is
Change in income = government expenditure * multiplier = 600m * 2.5 = N1500m. This tests the fiscal multiplier’s economic impact.
A firm’s marginal revenue is N30 at 50 units and N28 at 51 units. The marginal cost of the 51st unit is approximately
Marginal revenue change = 30 - 28 = N2. In competitive markets, marginal cost approximates marginal revenue at the margin, suggesting N2 as the cost.
If the price elasticity of supply is 1.8 and price increases by 10%, supply increases by
Elasticity of supply = % change in quantity supplied / % change in price. 1.8 = x/10, so x = 1.8 * 10 = 18%. This tests supply responsiveness.
The concept of a natural monopoly arises when
A natural monopoly occurs when one firm can serve the market at a lower average cost due to economies of scale, common in utilities like electricity.
A consumer buys 5 units of a good at N12 each, but would have paid N18 per unit. The total consumer surplus is
Consumer surplus per unit = willingness to pay - actual price = 18 - 12 = N6. Total surplus = 6 * 5 = N30. This tests consumer benefit calculation.
A firm’s total cost is N7,500 at 200 units and N8,100 at 210 units. The average cost at 210 units is
Average cost = total cost / quantity = 8,100/210 ≈ N38.57. This requires precise cost per unit computation.
If the velocity of money is 6 and nominal GDP is N1,800m, the money supply is
Velocity = nominal GDP / money supply. 6 = 1,800m / M, so M = 1,800m/6 = N300m. This tests the quantity theory of money.
The concept of price discrimination is most associated with
Price discrimination, where firms charge different prices to different consumers for the same good, is typically practiced by monopolies to maximize profits, leveraging market power.
A firm employs 12 workers at N400 each and produces 240 units. The labor cost per unit is
Total labor cost = 12 * 400 = N4,800. Labor cost per unit = 4,800/240 = N20. This tests per-unit cost allocation.
If a tax of N5 per unit reduces quantity demanded from 200 to 190 units, the total tax revenue is
Tax revenue = tax per unit * quantity after tax = 5 * 190 = N950. This tests government revenue calculation.
A consumer’s income is N1,200, Px = N60, and Py = N30. The maximum quantity of X they can buy is
Maximum quantity of X = income / Px = 1,200/60 = 20 units. This tests budget constraint limits.
In Nigeria, the major constraint to foreign direct investment is
Insecurity (e.g., insurgency) and poor infrastructure (e.g., unreliable power, bad roads) significantly deter foreign direct investment in Nigeria, increasing operational risks.
A firm’s marginal cost is N18 at 60 units and N22 at 70 units. The total cost increase for the additional 10 units is
Average marginal cost ≈ (18+22)/2 = 20. Total cost increase = 20 * 10 = N200. This tests cost increment estimation.
If the price of a good falls from N70 to N56 and supply decreases from 140 to 126 units, the price elasticity of supply is
Midpoint: % change in quantity = [(126-140)/(126+140)/2] = -14/133 = -10.53%. % change in price = [(56-70)/(56+70)/2] = -14/63 = -22.22%. Elasticity = |-10.53/-22.22| ≈ 1.0, reflecting unit elastic supply.
A consumer buys 8 units of a good at N10 each, but would have paid N16 per unit. The total consumer surplus is
Consumer surplus per unit = willingness to pay - actual price = 16 - 10 = N6. Total surplus = 6 * 8 = N48. This tests surplus aggregation.
The concept of terms of trade refers to
Terms of trade measure the ratio of a country’s export prices to its import prices, indicating the relative value of trade and purchasing power in international markets.
If a firm’s total revenue is N15,000 at 150 units and N16,200 at 160 units, the marginal revenue is
Marginal revenue = change in total revenue / change in quantity = (16,200-15,000)/(160-150) = 1,200/10 = N120. This tests revenue increment analysis.
A firm produces 400 units with a total cost of N10,000. If fixed costs are N4,000, the average variable cost is
Total variable cost = total cost - fixed cost = 10,000 - 4,000 = N6,000. Average variable cost = 6,000/400 = N15. This tests variable cost isolation.
If nominal GDP is N2,000m and the GDP deflator is 125, real GDP is
Real GDP = nominal GDP / (GDP deflator/100) = 2,000m / (125/100) = 2,000m / 1.25 = N1,600m. This tests inflation-adjusted output calculation.
The concept of fiscal policy involves
Fiscal policy uses government spending and taxation to influence economic variables like growth, employment, and inflation, addressing complex macroeconomic challenges.
The law of diminishing marginal returns states that as more of a variable input is added to a fixed input,
The law of diminishing marginal returns states that adding more of a variable input (e.g., labor) to a fixed input (e.g., capital) will eventually lead to a decrease in the marginal output produced by each additional unit of the variable input.
In a perfectly competitive market, a firm will continue to produce as long as
In a perfectly competitive market, a firm maximizes profit by producing where marginal revenue equals marginal cost, as this ensures that the cost of producing an additional unit equals the revenue it generates.
The balance of payments of a country includes
The balance of payments records all economic transactions between residents of a country and the rest of the world, including exports, imports, and financial transfers, reflecting international trade and capital flows.
Now practice in exam mode
You've studied the answers — now test yourself under real exam conditions with the timer running.
Start JAMB Economics 2005 Quiz