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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 86:
Given that the total fixed cost is N1,000, total variable cost N2,500 and the output, 100 unit.
Find the average total cost of producing one units?
  • A N 60
  • B N 45
  • C N 35
  • D N 30
View Answer & Explanation
Question 87:
In a small scale business, the fixed cost is N5,000, variable cost is N15,000 and the output is 500 units. What will be the unit cost of the goods?
  • A N400.00
  • B N80.00
  • C N40.00
  • D N20.00
View Answer & Explanation
Question 88:
If a total cost curve is plotted, marginal cost can be illustrated by the?
  • A Slope of the tangent to the curve at any given output
  • B U-shaped curve cutting the total cost curve at its lowest point
  • C Straight line from the origin to the mid-point of the curve
  • D Straight line cutting the curve at its highest point
View Answer & Explanation
Question 89:
At the point where marginal revenue of a monopolist is equal zero, its total revenue will be?
  • A Falling
  • B Rising
  • C Equal to zero
  • D Maximum
View Answer & Explanation
Question 90:
The firm whose sales and total revenue of the commodity as given in the table is
  • A A monopolist
  • B A monopolistic competitor
  • C An oligopolist
  • D A perfect competitor
View Answer & Explanation