WAEC Past Questions and Answers - Page 3226

16,126.

The profit of a producer is the difference between

A.

Total cost and marginal cost

B.

Total revenue and total cost

C.

Average cost and total cost

D.

Price and total cost

Correct answer is B

Total profit is determined by subtracting total costs from revenues. Total revenue is determined by multiplying the price received for each unit sold by the number of units sold.

16,127.

If the coefficient of price elasticity of demand is 0.1, demand is

A.

Elastic

B.

Inelastic

C.

Zero elastic

D.

Unitary elastic

Correct answer is B

The numerical values for the PED coefficient could range from zero to infinity. In general, the demand for a good is said to be inelastic (or relatively inelastic) when the PED is less than one (in absolute value): that is, changes in price have a less than proportional effect on the quantity of the good demanded.

16,128.

Goods consumed out of habit have

A.

Elastic demand

B.

Perfectly elastic demand

C.

Inelastic demand

D.

Unitary elastic demand

Correct answer is C

Inelastic demand in economics is when people buy about the same amount whether the price drops or rises. 

16,129.

A vector quantity can only be completely described when ……… and …………are mentioned.

A.

Magnitude and motion

B.

Magnitude and direction

C.

Distance and specified displacement

D.

Moment and momentum

Correct answer is B

A vector quantity has both magnitude and direction

There is an explanation video available below.

16,130.

The resultant force of a couple is ………?

A.

Infinity

B.

Zero

C.

One

D.

Half

Correct answer is B

Note: moment of a couple = force × length (fL)

The tangential force is actingin an opposite direction alongside its length

i.e f1 L1 = f2L2

f2L2 − f1 L1 = 0(i.e Zero)

There is an explanation video available below.