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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 31:
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 32:
One of the ways by which Government derives revenue from industrial enterprises in West Africa is?
  • A Tariffs
  • B Excise duties
  • C Poll tax
  • D Import duties
  • E Community tax
View Answer & Explanation
Question 33:
\(\begin{array}{c|c}
\text{Unit of output} & \text{Table cost}\\
\hline
1 & 20 \\
2 & 32 \\
3 & 42 \\
4 & 48 \\
5 & 50 \\
\end{array}\)
in the above table, the marginal cost of the 3rd unit of output is
  • A 12
  • B 6
  • C 10
  • D 2
  • E 9
View Answer & Explanation
Question 34:
Marginal cost curve intersects average cost curve ?
  • A From above at its lowest point
  • B From below before the lowest point
  • C From below at its lowest point
  • D From below after the lowest point
  • E At zero point
View Answer & Explanation
Question 35:
In perfect competition a firm's price is equal to its marginal revenue which is again equal to average revenue. This form maximizes its profits when its marginal cost (MC) is equal to price (p). Which of the curves in the diagram below represents the firm's marginal cost (MC)?
  • A Curve I
  • B Curve ll
  • C Curve lll
  • D Curve lV
  • E Curves l and lll
View Answer & Explanation