1.

Price elasticity of demand of a good is (-) 1. The consumer buys 50 units of that good when price is Rs.2 per unit. How many units will he buy if the price rises to Rs.4 per unit? Answer this question with the help of total expenditure method of determining price elasticity of demand.

Answer»
Price (Rs.)Quantity Demanded (Units)TE (Rs.)
250100
425100

Given,            Ed= -1.

In this case, when elasticity of demand is (-)1, total expenditure will remain constant.

Total Expenditure (TE) =2 x 50 = Rs.100

TE does not change

When prices is Rs.4 per unit

Quantity demanded = 100/4 = 25 unit



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