问题
单项选择题
If a 10 percent income increase caused a group of consumers to increase their purchases of television sets from 95 to 105, the group's income elasticity of demand for television sets would be closest to:（）
A..1.00.
B..0.10.
C.0.83.
答案
参考答案：A
解析：
Income elasticity is the sensitivity of demand to changes in consumer income. Income elasticity = (percent change in quantity demanded)/( percent change in income) =[(105-95)/100]/0.10=1.00.