when price is 9/- per unit, demand for a commodity is 90 units. As the price falls to 7/- per unit, demand expands to 140 units . calculate elasticity of demand
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At Rs. 26 per unit, the demand for a commodity is 30 units. If the price increases from Rs. 26 to Rs. 30 per unit, the demand decreases to 15 units. Calculate the price elasticity of demand.
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