Question

一个镇上有 $351$ 名成年人，每个成年人拥有汽车、摩托车，或两者都有。若 $331$ 名成年人拥有汽车， $45$ 名成年人拥有摩托车，那么有多少名汽车拥有者不拥有摩托车？

In a town of $351$ adults, every adult owns a car, a motorcycle, or both. If $331$ adults own cars and $45$ adults own motorcycles, how many of the car owners do not own a motorcycle?

$20$

$25$

$45$

$306$

$351$

答案：D

知识点：容斥原理

难度评级：870

解答：

已知有 $45$ 人拥有摩托车，所以 $351 - 45 = 306$ 人不拥有摩托车。

所以正确答案是 D。

We know that $45$ people own motorcycles, so $351 - 45 = 306$ people do not own motorcycles.

Thus, D is the correct answer.

2011 AMC 8 第 6 题

答案：D

难度评级：870

解答：

其他年份的第 6 题