EconomicsNEB 2081

Answer the following questions based on the given table. Unit of goods sold Price in Rs. TR (Rs.) AR (Rs.) MR (Rs.) : : : : : : : : : : 1 35 2 30 3 25 4 20 a) Complete the given table. [3] b) Draw…

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Answer the following questions based on the given table.

Unit of goods sold Price in Rs. TR (Rs.) AR (Rs.) MR (Rs.)
1 35 - - -
2 30 - - -
3 25 - - -
4 20 - - -
  • a) Complete the given table. [3]
  • b) Draw MR and AR curves from the completed table. [2]

Answer

a) Completed Table

We calculate Total Revenue (TR), Average Revenue (AR), and Marginal Revenue (MR) using the formulas:

  • TR = Price × Quantity
  • AR = TR / Quantity
  • MR = Change in TR / Change in Quantity
Unit of goods sold Price in Rs. TR (Rs.) AR (Rs.) MR (Rs.)
1 35 35 35 -
2 30 60 30 25
3 25 75 25 15
4 20 80 20 5

Step-by-step calculations:

  • For 1 unit: TR = 35 × 1 = 35, AR = 35 / 1 = 35, MR = N/A (no previous unit).
  • For 2 units: TR = 30 × 2 = 60, AR = 60 / 2 = 30, MR = (60 − 35) / (2 − 1) = 25.
  • For 3 units: TR = 25 × 3 = 75, AR = 75 / 3 = 25, MR = (75 − 60) / (3 − 2) = 15.
  • For 4 units: TR = 20 × 4 = 80, AR = 80 / 4 = 20, MR = (80 − 75) / (4 − 3) = 5.

b) MR and AR Curves

Units Sold (Q)Revenue (Rs.)OAR (Average Revenue)MR (Marginal Revenue)P1P2P3P4
MR and AR curves derived from the given price schedule (MR drops below AR after the first unit due to downward-sloping demand).
Quantity (Units)Price (Rs.)ODemand (AR)
Demand curve illustrating why MR falls twice as fast as AR in linear demand.

Key Observations:

  • AR curve is a straight line sloping downward, reflecting the falling price per unit as quantity increases.
  • MR curve lies below AR and declines more steeply, reflecting the law of diminishing marginal revenue in a monopolistic or imperfectly competitive market.
  • At x = 1, MR is undefined (no previous unit). From x = 2 onward, MR is calculated as the change in TR per additional unit.
  • The gap between AR and MR widens as quantity increases, illustrating that each additional unit sold contributes less to total revenue.

Discussion

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