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Question 34 of 40

Q.Write a short note on Marginal Revenue.

Tamil Nadu DgeTamil Nadu HSC First Year (DGE) Commerce Board 2025Subjective· 3mImportance★★★★★
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Marginal Revenue is the extra total revenue earned from selling one additional unit; MR = ΔTR ÷ ΔQ.

Marginal Revenue (MR) is the net addition to total revenue made by selling one more unit of output.

Formula:

  • MR = change in Total Revenue (ΔTR) ÷ change in quantity (ΔQ)
  • MR of the nth unit = TR of n units − TR of (n − 1) units

Example: if selling 4 units gives TR = 40 and selling 5 units gives TR = 48, then MR of the 5th unit = 48 − 40 = 8.

Important relationships:

  • Under perfect competition, price is constant, so MR = AR = Price. …

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