WAEC Past Questions and Answers - Page 3278

16,386.

Which of the following is capable of increasing the population of a country?

A.

Increase in birth rate

B.

Increase in death rate

C.

Poor medical facilities

D.

Decrease in birth rate

Correct answer is A

Birth rate is the proportion of births to the total population in a place in a given time. That is, the amount of babies born and alive  in a given period of time. An increase in the birth rate would cause the population of that geographical area to increase.

16,387.

The law of diminishing marginal utility applies to a

A.

Firm which minimizes cost

B.

Consumer who maximizes satisfaction

C.

Producer who maximizes marginal product

D.

Consumer who minimizes total utility

Correct answer is B

The law of diminishing marginal utility states that the marginal utility of a good or service declines as its consumption increases. This means that, as a consumer keeps consuming additional units of a commodity, the additional satisfaction derived will keep decreasing (goods become less valuable as you continue consuming more of it)

16,388.

Why is the law of diminishing returns a short run phenomenon?

A.

All inputs are fixed

B.

All inputs are variable

C.

Some outputs are variable

D.

Some inputs are variable

Correct answer is A

The law of diminishing returns states that as an increasing amount of a variable factor is added to a fixed factor, the marginal product of the variable factor may at first rise but must eventually fall.

The law of diminishing returns applies in the short run because only then is some factor fixed. 

16,389.

If a particular consumer derives total utility of 22 utils having consumed 4 units of a given product, his average utility will be

A.

88 utils

B.

18 utils

C.

5.5 utils

D.

3.5 utils

Correct answer is C

Average utility will be the total utility derived form the consumption of a commodity divided by the number of units consumed. Thus we have;

22 ÷ 4 = 5.5 utils

16,390.

Given the demand function Qd = 20 - 1/ 2P. What is Qd when P is $12?

A.

6 units

B.

10 units

C.

12 units

D.

14 units

Correct answer is D

No explanation has been provided for this answer.