AMC 8 2011 Problem 6

AMC8 2011 年第 6

基本计数原理★★☆☆☆
In a town of 351 adults, every adult owns a car, motorcycle, or both. If 331 adults own cars and 45 adults own motorcycles, how many of the car owners do not own a motorcycle?
在一个有 351 个成年人的小镇,每个成年人都有汽车,摩托车或者两者兼具。若 331 人有汽车,45 人有摩托车,那么拥有汽车的人当中,有多少人没有摩托车?
  1. A.20
  2. B.25
  3. C.45
  4. D.306
  5. E.351

正确答案 · Correct Answer

D

解析 · Solution

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