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P5 June 2009 Qs 4

Ppeter100910y ago
Hi Where does the figures/formula for TR and MR come from? I understand that Po = 400 + (0.25x1,440) = $760 and therefore Px = 760 - 0.25X TR = 760X - 0.25X squared (why?) MR = 760 - 0.5X (why?) MC = 200 (2 persons x $100) Thanks
kengarrettkengarrettTutor10y ago#1
Po = 760 - 0.25 X Revenue = Price x Quantity = Po X = 760X = 0.25 X^2 The mathematical way to get from Revenue to Marginal revenue requires you to differentiate this function to give Mr = dR/DX. HOwever, you would not have been required to carry out that step. Instead a formula would have been provided in the exam something like: If revenue, R = aQ - bQ^2 MArginal revenue = MR = a - 2bQ
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