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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 81:
If an increase in the price of a commodity leads to increase in total revenue, then it means that the demand for this commodity is?
  • A Normal
  • B Elastic
  • C Inelastic
  • D Abnormal
View Answer & Explanation
Question 82:
What is the average total cost when output is 200 units in the table above is
  • A N1.00
  • B N2.0
  • C N1.20
  • D N2.40
View Answer & Explanation
Question 83:
Abubakar has the choice of buying either a house ruining cost. If he decides to buy the Mercedes Benz car, his opportunity cost is?
  • A N 1.5 m
  • B N 2.0m
  • C The house
  • D The car
View Answer & Explanation
Question 84:
The downward sloping part of the long-run average cost curve of a firm may be attributable to?
  • A Diminishing returns
  • B The law of variable proportions
  • C Diseconomies of scale
  • D Increasing returns to scale
View Answer & Explanation
Question 85:
A characteristic of the average fixed cost is that, it?
  • A Rises and falls faster than the marginal cost
  • B Is U-shaped and intersects the price axis
  • C Is always higher than the average variable cost
  • D Falls continuously but is never equal to zero
View Answer & Explanation