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1990 WAEC Economics Theory The demand and supply function of a commodity are given as follows: Quantity demanded (Qd)...

Economics
WAEC 1990

The demand and supply function of a commodity are given as follows:
Quantity demanded (Qd) = 20 - 2p
Quantity supplied (Qs) = 6P - 12 where P = price in naira
(a) Determine the equilibrium price and quantity bought and sold at that price.
(b) If the price of the commodity is fixed at N60.00, what is the magnitude of the excess supply?

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Explanation

Qd = 20 - 2p
Qs = 6p - 12

(a) Qd = Qs
20- 2P = 6P - 12
8P = 32, p = \(\frac{32}{8}\) = p =4
Qd = 20 - 2p = 20 - 2(4) = 20 - 8 =12
Qs = 6p - 12 = 6(4) - 12 = 24 - 12 = 12

(b) Qs = 6p - 12 = 6(6) -12 = 36 - 12 =24
The magnitude of the excess supply will be 24 - 12 = 12


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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709