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प्रश्न
Price elasticity of demand of a good is (-)1. When its price per unit falls by one rupee, its de from 16 to 18 units. Calculate the price before a change
उत्तर
Given that
`Q_1 = 16`
`Q_2 = 18`
`P_2 = -1`
As we know that
`Q = Q_2 - Q_1 = 18 - 6 = 2`
`E_d = (DeltaQ)/Q xx P/(DeltaP)`
`-1 = 2/16 xx P/((-1))`
`-1 = ((-P))/8`
`P_1 = 8`
Thus,price before change is Rs 8
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