Question

在二千零一十三年 Winnebago County Fair 上，一个摊贩正在对凉鞋推出“集市特价”。如果你以正常价格 $\$50$ 买一双凉鞋，第二双打 $40 \%$ 折扣，第三双半价。

Javier 利用这个“集市特价”买了三双凉鞋。与 $\$150$ 的正常总价相比，他节省了百分之多少？

At the 2013 Winnebago County Fair a vendor is offering a "fair special" on sandals. If you buy one pair of sandals at the regular price of $\$50,$ you get a second pair at a $40 \%$ 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 $\$150$ regular price did he save?

$25$

$30$

$33$

$40$

$45$

答案：B

知识点：百分数

难度评级：1020

视频讲解：

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文字解答：

Javier 第二双节省 $0.40 \cdot 50 = 20$ 美元。第三双节省 $50 / 2 = 25$ 美元。因此他一共节省 $45$ 美元。

因为所以与正常价格相比，他节省了 $30 \%$ 。 $45 / 150 = 3 / 10 = .30,$

所以正确答案是 B。

Javier saved $0.40 \cdot 50 = 20$ dollars on the second pair. He also saved $50 / 2 = 25$ dollars on the third pair. This shows that he saved a total of $45$ dollars.

As $45 / 150 = 3 / 10 = .30,$ we can conclude that Javier saved $30 \%$ compared to the regular price.

Thus, B is the correct answer.

2013 AMC 8 第 12 题

答案：B

难度评级：1020

视频讲解：

文字解答：

其他年份的第 12 题