JAMB Economics Past Questions & Answers - Page 29

141.

PN equals average revenue or marginal revenue cure of

A.

An imperfect competitive firm

B.

A monopoly

C.

A perfectly competitive firm

D.

A monopolistic competitive firm

Correct answer is C

The figure PN in the diagram is Average revenue or marginal revenue of a perfect market or perfectly competitive firm.

142.

The demand curve for goods of ostentation is usually

A.

Negatively sloped

B.

Positively sloped

C.

Vertical

D.

Horizontal

Correct answer is B

Ostentation goods are goods that are expensive such as jewelries, gold wrist watch etc. The higher the price, the higher the quantity demanded. Therefore, the relationship between price and quantity demanded is positive.

143.

The increase in the demand for a commodity may lead to a decrease in the demand for another if both are

A.

In complementary demand

B.

Of the same quality

C.

In composite demand

D.

In competitive demand

Correct answer is D

Competitive demand is also known as subtituted demand. There are alternative commodities which can satisfy similar wants wants i.e they posses identical utilities. An increased in demand for one will lead to a decreased demand for the other.

144.

The mining sector of an economy contributes 60% to the Gross Domestic Product(GDP). If the GDP is $540, what is the contribution of the mining sector?

A.

$90.00

B.

$180.00

C.

$324.00

D.

$350.00

Correct answer is C

The contribution of the mining sector = 60% x 540

= 324

145.

A major disadvantage of a capitalist economy is that it

A.

Leads to low production of goods and services

B.

Requires large number of officials to operate

C.

Considers individual consumer's satisfaction

D.

Worsens income inequality among the citizens

Correct answer is D

One of the disadvantage of capitalism is that wealth and control of means of production is concentrated in the hands of every few individuals. The rich families alwalys control the wealth of the society.