2013 AMC 8 第 12 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
12.
在 年威尼贝戈县集市上，一个摊贩正在对凉鞋推出“集市特价”。如果你以正常价格 买一双凉鞋，第二双打 折扣，第三双半价。
哈维尔利用这个“集市特价”买了三双凉鞋。与 的正常总价相比，他节省了百分之多少？
At the Winnebago County Fair a vendor is offering a “fair special” on sandals. If you buy one pair of sandals at the regular price of you get a second pair at a discount, and a third pair at half the regular price.
Javier took advantage of the “fair special” to buy three pairs of sandals. What percentage of the regular price did he save?
答案：B
小提示：
计算每双凉鞋实际支付的价格
Compute the price paid for each pair of sandals.
大提示：
将总节省金额与正常总价 比较
Compare the total savings with the regular total of .
视频讲解：
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文字解答：
哈维尔第二双节省 美元。第三双节省 美元。因此他一共节省 美元。
因为 所以与正常价格相比，他节省了 。
所以正确答案是 B。
Javier saved dollars on the second pair. He also saved dollars on the third pair. This shows that he saved a total of dollars.
As we can conclude that Javier saved compared to the regular price.
Thus, B is the correct answer.
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