NO.PZ2023010401000013
问题如下：
The price of a good falls from $15 to $13. Given this decline in price, the quantity demanded of the good rises from 100 units to 120 units. The arc price elasticity of demand for the good is closest to:选项：
A.1.3. B.1.5. C.10.0.解释：
Arc price elasticity of demand is calculated as: %ΔQ/%ΔP = (ΔQ/Qavg) / (ΔP/Pavg).
In this case, (20/110)/(2/14) = 1.27 rounded to
1.3.
中文解析：
弧需求价格弹性计算公式为:%ΔQ/%ΔP = (ΔQ/Qavg) / (ΔP/Pavg)。
在这种情况下，(20/110)/(2/14)= 1.27四舍五入到1.3。
怎么区分题目要求的是点弹性还是弧弹性呢？
这题如果要算点弹性，可以算的出来吗？
