A. Explain price elasticity of demand.    B. Consider the demand for a good. At price ` 4, the demand for the good is 25 units.Suppose price of the good increases to ` 5, and as a result, the demand for the good falls to 20 units. Calculate the price elasticity

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Chapter20: Elasticity: Demand And Supply
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A. Explain price elasticity of demand.   

B. Consider the demand for a good. At price ` 4, the demand for the good is 25 units.Suppose price of the good increases to ` 5, and as a result, the demand for the good falls to 20 units. Calculate the price elasticity

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