问题
单项选择题
A toy store regularly sells all stock at a discount of 20 percent to 40 percent. If an additional 25 percent were deducted from the discount price during a special sale, what would be the lowest possible price of a toy costing $16 before any discount ？（）
A.$5.60
B.$7.20
C.$8.80
D.$9.60
E.$15.20
答案
参考答案：B
解析：
做对此题的关键在于对最后一句话的理解。要使价格最低，就要使玩具的打折的幅度最大，根据题意可得，该玩具的最低可能价格为：
16×(1-40%)(1-25%)=7.2美元