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Friday, 17 April 2026
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Economics Past Questions and Answers

Topic: The concepts of cost

Jamb Economics Questions - The concepts of cost

Question 21:
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 22:
pricing and output decisions of sellers are highly interdependent in markets known as?
  • A Oligopoly
  • B Perfect competition
  • C Monopoly
  • D Monopolistic competition
  • E Imperfect competititon
View Answer & Explanation
Question 23:
Question 39 and 40 are based on the table below:
The international production set for Nigeria and Austria is:
\(\begin{array}{c|c}
Products & Nigeria & Austria \\
\hline
Cocoa & 20 \text{tonnes} & 12 \text{tonnes}\\
\hline
Lace & 10 \text{meters} & 8 \text{meters} \\
\end{array}\)
The opportunity cost ratio for cocoa and lace for Austria and Nigeria is
  • A 2,2
  • B 2,1.5
  • C 1.5,4
  • D 1.5,2
  • E 0.5,1.5
View Answer & Explanation
Question 24:
The table above shows the short-run costs of a firm. What is the firm's marginal cost for the third item produced?
  • A N350.00
  • B N340.00
  • C 360.00
  • D 370.00
  • E 55.00
View Answer & Explanation
Question 25:
Bisi needs a book costing N10.00 and a hat costing N10.00. If Bisi buys the book instead of the hat, the opportunity cost of his choice is the?
  • A Cost of the bok
  • B Cost of the hat
  • C Book
  • D Hat
  • E N10.00
View Answer & Explanation