1956 AMC 12 第 2 题

Question

琼斯先生以每根

\$1.20

的价格卖出两根烟斗。按成本计算，其中一根获利

20\%

，另一根亏损

20\%

。在这笔交易中，他：

Mr. Jones sold two pipes at

\$1.20

each. Based on the cost his profit on one was

20\%

and his loss on the other was

20\%.

On the sale of the pipes, he:

收支相抵

broke even

亏损

4

¢

lost

4

¢

获利

4

¢

gained

4

¢

亏损

10

¢

lost

10

¢

获利

10

¢

gained

10

¢

答案：D

知识点：profit and loss reverse percentages cost price

难度评级：1340

小提示：

将售价除以

1.2

或

0.8

，求出各自的成本

Recover each cost by dividing the sale price by

1.2

or

0.8

大提示：

将总成本与总售价

\$2.40

比较

Compare the combined cost with the combined selling price of

\$2.40

解答：

获利

20\%

的烟斗成本为

\frac{\$1.20}{1.20}=\$1.00\text{，}

而亏损

20\%

的烟斗成本为

\frac{\$1.20}{0.80}=\$1.50\text{。}

两根烟斗的总成本为

\$2.50

，但总售价为

\$2.40

，所以琼斯先生亏损

10

美分。

因此，正确答案是 D。

The pipe sold at a

20\%

profit cost

\frac{\$1.20}{1.20}=\$1.00,

while the pipe sold at a

20\%

loss cost

\frac{\$1.20}{0.80}=\$1.50.

Their combined cost was

\$2.50,

but they sold for

\$2.40,

so Mr. Jones lost

10

cents.

Thus, the correct answer is D.

1956 AMC 12 第 2 题

答案：D

难度评级：1340

小提示：

大提示：

解答：

其他年份的第 2 题