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Answer to Question #64255 in Microeconomics for reyuf

Question #64255

In a particular town there are 100 cars and 50 motorcycles. Each car owner has a demand curve for petrol given by: Qdc = 20 – 5p for p ≤ 4 and Qdc = 0 for p > 4. Each motorcycle owner has the following demand function for petrol: Qdm = 15 – 3p for p ≤ 5 and Qdm = 0 for p > 5. Prices are expressed as SR per gallon, and quantities as gallons per week.
a) If the price is SR 3, now many gallons of petrol per week are bought by (i) each car owner and (ii) each motorcycle owner?

b) Sketch the market demand curve for petrol (that is, the combined demand from car and motorcycle owners).

c) Write an algebraic expression for the market demand function.
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