1999 AMC 12 第 5 题

Question

一本书的标价比建议零售价低

30\%

。Alice 在五十周年促销中以标价的一半买下这本书。Alice 支付的是建议零售价的百分之几？

The marked price of a book was

30\%

less than the suggested retail price. Alice purchased the book for half the marked price at a Fiftieth Anniversary sale. What percent of the suggested retail price did Alice pay?

25\%

30\%

35\%

60\%

65\%

答案：C

知识点：百分数

难度评级：960

小提示：

设建议零售价为

P

。

Let the suggested retail price be

P

大提示：

标价是

0.7P

，Alice 支付其中一半。

The marked price is

0.7P,

and Alice pays half of that

解答：

若建议零售价为

P

，则标价为

0.7P

。Alice 支付其中一半，即

0.35P

，也就是建议零售价的

35\%

。

所以正确答案是 C。

If the suggested retail price is

P,

then the marked price is

0.7P.

Alice pays half of this,

0.35P,

which is

35\%

of the suggested retail price.

Thus, the correct answer is C.

1999 AMC 12 第 5 题

答案：C

难度评级：960

小提示：

大提示：

解答：

其他年份的第 5 题