If the price of a good rises by 10 percent and quantity demanded falls by 20
percent, we can predict that
please i need help and explanation for the answer
1
Expert's answer
2017-10-19T05:08:07-0400
The question concerns the indicator that shows the extent to which the price of a good (p) influences quantity demanded (q). It’s so called “price elasticity of demand” (E(p)). Price elasticity of demand is the relative change in quantity demanded given a one percent change in the price. E_((p))=(∆q/q)/(∆p/p); If the price of a good rises by 10 percent and quantity demanded falls by 20 percent the value of the price elasticity will be E_((p))=(∆q/q)/(∆p/p)=(-0.2)/(+0.1)=-2.0. It means that one percent change in price stipulates 2% decrease in quantity demanded by consumers, and that the demand for this good is quite elastic |E_((p)) |>1. We can predict that the total revenue (TR) of the firm, that produces / sells the good will decline Let 〖TR〗_0=pq. After the changes: 〖TR〗_1=p(1+1.1)×q(1-0.2)=1.1p×0.8q=0.88pq=0.88〖TR〗_0. So the total revenue (TR) of the firm will decline by 12% (10.88).
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