In the market for coffee, the price has declined by 20% and at the same time the quantity sold has increased by 10%. What was the cause of these changed: an increase in supply an increase in demand  a decrease in supply a decrease in demand

Microeconomics
13th Edition
ISBN:9781337617406
Author:Roger A. Arnold
Publisher:Roger A. Arnold
Chapter3: Supply And Demand: Theory
Section3.3: The Market: Putting Supply And Demand Together
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In the market for coffee, the price has declined by 20% and at the same time the quantity sold has increased by 10%. What was the cause of these changed:

an increase in supply

an increase in demand 

a decrease in supply

a decrease in demand 

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