Question

一个小镇的人口是 $480$ 。一张省略纵轴刻度的男女数量条形图显示，女性人数是男性人数的两倍。这个小镇有多少名男性？

The population of a small town is $480.$ A bar graph of the number of females and males, with the vertical scale omitted, shows that there are twice as many females as males. How many males live in the town?

$120$

$160$

$200$

$240$

$360$

答案：B

知识点：比与比例

难度评级：720

解答：

若男性人数为 $M$ ，则女性人数为 $2M$ ，总人口满足 $M + 2M = 480$ 。

所以 $3M = 480$ ，得到 $M = 160$ 。

所以正确答案是 B。

If there are $M$ males, then there are $2M$ females, and together $M + 2M = 480.$

So $3M = 480,$ giving $M = 160.$

Thus, the correct answer is B .

1992 AMC 8 第 9 题

答案：B

难度评级：720

解答：

其他年份的第 9 题