POST UTME ACHIEVERS UNIVERSITY 2019 Economics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A firm in Nigeria is producing a commodity with a production function Q = 2L^0.5K^0.5. If the price of the commodity is ₦100 and the wage rate is ₦50, what is the profit-maximizing level of labor?
A. 10
B. 20
C. 30
D. 40
Question 2
A consumer has a budget of ₦100 and wants to buy two goods, A and B. The prices of the goods are ₦20 and ₦30, respectively. If the consumer wants to sp\end at least ₦50 on good A, what is the maximum amount the consumer can sp\end on good B?
A. ₦20
B. ₦30
C. ₦40
D. ₦50
Question 3
A consumer's utility function is given by U = 2x + 3y, where x and y are the quantities of two goods. If the consumer's income is ₦1000 and the prices of the two goods are ₦5 and ₦10 respectively, what is the consumer's optimal bundle of goods?
A. x = 40, y = 20
B. x = 30, y = 30
C. x = 20, y = 40
D. x = 10, y = 50
Question 4
A firm has a production function given by Q = 2L^0.5K^0.5, where Q is the output, L is the labor, and K is the capital. If the firm wants to increase its output by 20% and has 10 units of labor and 8 units of capital, what is the new output?
A. 20
B. 25
C. 30
D. 35
Question 5
A firm's production function is given by Q = 2L^0.5K^0.5, where Q is output, L is labor, and K is capital. If the firm's labor and capital inputs are doubled, what is the effect on output?
A. Output increases by a factor of 2
B. Output increases by a factor of 4
C. Output increases by a factor of 8
D. Output remains unchanged
Question 6
The following diagram shows a perfectly competitive market with two firms, A and B. If firm A increases its price from ₦100 to ₦120, what will be the effect on firm B's output?
A. Increase
B. Decrease
C. No change
D. Uncertain
Question 7
A firm is producing a good with a production function \( Q = 2L^2 + 3K^2 \), where ( L ) is labor and ( K ) is capital. If the firm's \cost function is ( C(L,K) = 2L + 3K + 10 ), find the input combination that minimizes the \cost of producing 100 units of output.
A. \( L = 5, K = 5 \)
B. \( L = 10, K = 2 \)
C. \( L = 2, K = 10 \)
D. \( L = 15, K = 1 \)
Question 8
A firm's demand function is given by Q = 100 - 2P. The firm's marginal revenue function is MR = 50 - 2Q. If the firm's fixed \cost is ₦500, what is the firm's optimal output?
A. 10 units
B. 20 units
C. 30 units
D. 40 units
Question 9
A firm is facing a demand curve ( D(p) = 100 - 2p ) and a supply curve ( S(p) = 20 + 5p ). If the firm's marginal revenue is ( MR(p) = 100 - 4p ), find the profit-maximizing price and quantity.
A. \( p = 15, q = 35 \)
B. \( p = 20, q = 30 \)
C. \( p = 25, q = 25 \)
D. \( p = 30, q = 20 \)
Question 10
A monopolist faces a demand curve given by Q = 100 - 2P. The firm's marginal revenue function is MR = 50 - 2Q. If the firm's fixed \cost is ₦500, what is the firm's optimal price?
A. ₦40
B. ₦50
C. ₦60
D. ₦70
Question 11
A consumer's indifference curve is given by U = 2x + 3y, where x and y are the quantities of two goods. If the consumer's income is ₦1000 and the prices of the two goods are ₦5 and ₦10 respectively, what is the consumer's optimal bundle of goods?
A. x = 40, y = 20
B. x = 30, y = 30
C. x = 20, y = 40
D. x = 10, y = 50
Question 12
A firm produces two goods, X and Y, u\sing two inputs, labor (L) and capital (K). The production functions are given by X = 2L + 3K and Y = 4L + 2K. If the firm has 10 units of labor and 8 units of capital, what is the total output?
A. 40
B. 50
C. 60
D. 70
Question 13
A firm's production function is given by Q = 2L^0.5K^0.5. If the firm's input prices are w_L = ₦100 and w_K = ₦200, and the firm's output price is P = ₦500, what is the firm's optimal input combination?
A. L = 100, K = 100
B. L = 200, K = 200
C. L = 300, K = 300
D. L = 400, K = 400
Question 14
A firm is operating in a perfectly competitive market with a cons\tant \cost function. If the firm's average \cost curve intersects its marginal \cost curve at a point where the average \cost is ₦120, what is the firm's optimal output?
A. 10 units
B. 20 units
C. 30 units
D. 40 units
Question 15
A firm has a budget constraint of 100 units of labor and 50 units of capital. If the price of labor is ₦50 and the price of capital is ₦100, what is the opportunity \cost of labor?
A. ₦50
B. ₦100
C. ₦150
D. ₦200

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