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Economics Past Questions and Answers

Jamb 1992 Economics Questions

Question 46:
Calculate the marginal physical product of the last unit of input
  • A O
  • B 2
  • C 4
  • D 10
View Answer & Explanation
Question 47:
At what level of input has diminishing marginal returns set in?
  • A 3
  • B 16
  • C 20
  • D 22
View Answer & Explanation
Question 48:
\(\begin{array}{c|c}
\text{Age group(years)} & \text{Distribution(%)} \\ \hline
\text{Above 60} & 30 \\
\hline
15 - 60 & 45 \\
\hline
0 - 14 & 25 \\
\end{array}\)
The estimated dependency ratio of the population distribution shown here is
  • A 11:9
  • B 9:11
  • C 7:3
  • D 3:7
View Answer & Explanation
Question 49:
\(\begin{array}{c|c}
\text{Population(Million)} & \text{Food Production(Milion tonnes)} \\
50 & 220 \\
70 & 210 \\
90 & 225 \\
100 & 275 \\
\end{array}\)
In the data above, what is the optimum population in million?
  • A 50
  • B 70
  • C 90
  • D 100
View Answer & Explanation
Question 50:
\(\begin{array}{c|c}
\text{Quantity of singlets} & \text{Short run total costs(N)} \\
0 & 1,000 \\
10 & 1,200 \\
20 & 1,400 \\
30 & 1,600 \\
40 & 1,800 \\
\end{array}\)
The short run total costs for different levels of output for a firm producing singlets are shown above. Calculate the variable cost per unit at an output of 20.
  • A N1000
  • B N400
  • C N70
  • D N20
View Answer & Explanation