Question

鱼市的招牌写着：“仅限今天， $50 \%$ 折扣：半磅装每包只要 $\$3$ 。”一整磅鱼的正常价格是多少美元？

A sign at the fish market says, " $50 \%$ off, today only: half-pound packages for just $\$3$ per package." What is the regular price for a full pound of fish, in dollars?

$6$

$9$

$10$

$12$

$15$

答案：D

知识点：百分数钱币

难度评级：450

视频讲解：

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文字解答：

促销时半磅价格为 $\$3$ ，所以一磅促销价为 $2 \cdot \$3 = \$6$ 。

促销价是正常价格的 $50\%$ ，所以正常价格是促销价的两倍。因此一磅鱼的正常价格是 $2 \cdot \$6 = \$12$ 。

所以正确答案是 D。

During the sale, the price for half a pound is $\$3,$ and therefore, the price for a full pound is $2 \cdot \$3 = \$6.$

The sale price is $50\%$ off the regular price, and so the regular price is twice the sale price. Therefore, the regular price for a full pound of fish is $2 \cdot \$6 = \$12.$

Thus, D is the correct answer.

2013 AMC 8 第 2 题

答案：D

难度评级：450

视频讲解：

文字解答：

其他年份的第 2 题