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Thursday, 01 October 2026
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Economics Past Questions and Answers

Topic: Total cost

Jamb Economics Questions - Total cost

Question 1:
if AC = Average Cost of production ,
TC = Total Cost of production
VC = Variable Cost of production
FC = Fixed Cost of production
Q = Quantity of goods produced
Then,
  • A AC = TC; TC = VC + FC
  • B AC = (TC) Q: TC = VC + FC
  • C AC = TC; TC = (VC)(FC) Q
  • D AC = TC- FC: VC = TC- AC
  • E AC = TC ; TC = VC + AC Q
View Answer & Explanation
Question 2:
BY definition, variable cost (VC) is related to total costs (TC) and fixed costs (FC) by the equation?
  • A VC =TC + FC
  • B VC = TC - FC
  • C VC = TC/FC
  • D VC = (TC)(FC)
View Answer & Explanation
Question 3:
In the theory of production and cost, the average total cost of a firm is minimized when the marginal cost curve cuts the average total cost curve at its?
  • A Lowest point
  • B Middle point
  • C Maximum point
  • D Downward slopping section
View Answer & Explanation
Question 4:
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 5:
The average total cost when 20 units are produced is
  • A N20.00
  • B N23.00
  • C N13.00
  • D N15.00
View Answer & Explanation