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Sagot :
Answer: d. is elastic.
Explanation:
A good is said to be elastic when its price elasticity of demand is greater than one.
Price elasticity of demand shows the change in quantity demanded as a result of a change in price.
Formula is:
= Percentage change in quantity demanded / Percentage change in price
Percentage change in price = (100 - 120) / 120 = -16.7%
Percentage change in quantity demanded = (13 - 10) / 10 = 30%
Price elasticity of demand = 30% / -16.7%
= -1.8
Price elasticity of demand is greater than the number 1 so this is elastic.
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