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Tuesday, 18 August 2026
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Economics Past Questions and Answers

Topic: Theory of Costs and Revenue

Jamb Economics Questions - Theory of Costs and Revenue

Question 96:
The short-run equilibrium output for a monopolist is determined by the?
  • A Highest point on the total revenue curve
  • B Minimum point on the average revenue and the average cost curve
  • C Intersection of the average revenue and the average cost curves
  • D Intersection of the marginal cost and marginal revenue curves
View Answer & Explanation
Question 97:
In the short-run a firm marginal cost curve above the point of shut-down is its?
  • A Demand curve
  • B Supply curve
  • C Cost curve
  • D Supply curve
View Answer & Explanation
Question 98:
Which of the following yields more revenue to Nigeria?
  • A Value added tax
  • B Royalties
  • C Indirect tax
  • D Direct tax
View Answer & Explanation
Question 99:
In the diagrams, the opportunity cost of a unit of cotton in terms of cocoa is
  • A 4 for Ghana; 2 for Nigeria
  • B 20 for Ghana; 60 for Nigeria
  • C 1/4 for Ghana; 1/2 for Nigeria
  • D 5 for Ghana; 30 for Nigeria
View Answer & Explanation
Question 100:
\(\begin{array}{c|c} \text{Out put produced per day (Units)} & \text{Fixed cost per day (N)} & \text{Total cost per day (N)} \\ \hline 20 & 60 & 100 \\ \hline 30 & 60 & 120 \\ \hline 40 & 60 & 130 \\ \hline 50 & 60 & 135 \\ \hline 60 & 60 & 150 \\ \hline 70 & 60 & 170 \\ \hline 80 & 60 & 190\end{array}\)
At 60 units of output, the AVC is
  • A ₦2.50
  • B ₦1.50
  • C ₦90.00
  • D ₦150.00
View Answer & Explanation