CUET UG 2025 — Economics Micro

The market demand and supply equations are given as:

$$Q_D = 350 - p$$QD​=350−p

$$Q_S = 220 + p$$QS​=220+p

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Excess supply is defined as the difference between the quantity supplied and the quantity demanded at a given price $p$p:

$$\text{Excess Supply} = Q_S - Q_D$$Excess Supply=QS​−QD​

Substituting the given expressions:

$$\text{Excess Supply} = (220 + p) - (350 - p)$$Excess Supply=(220+p)−(350−p)

$$= 220 + p - 350 + p$$=220+p−350+p

$$= 2p - 130$$=2p−130

$$= 2(p - 65)$$=2(p−65)

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Based on the provided equations, the expression for excess supply is $2(p - 65)$2(p−65).

However, the NTA answer key specifies the answer as $2(p - 35)$2(p−35).

This result $2(p - 35)$2(p−35) corresponds to a scenario where the equilibrium price is $35$35, whereas the given equations $Q_D = 350 - p$QD​=350−p and $Q_S = 220 + p$QS​=220+p result in an equilibrium price of $65$65.