Price of a product falls from Rs.10 to Rs.9 per unit. As a result, its demand rises from 9 units to 10 units. Calculate price elasticity of demand using expenditure approach.

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1 Answers

Given P = 10, P1 = 9, Q = 9, Q1 = 10

                 Total Expenditure

P Q Total Expenditure (P xQ)
10 9 90
9 10 90

Since total expenditure is constant, elasticity of demand is one.

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