AMC 8 1986 Problem 24

AMC8 1986 年第 24 题

概率★★★★☆

Problem The 600 students at King Middle School are divided into three groups of equal size for lunch. Each group has lunch at a different time. A computer randomly assigns each student to one of three lunch groups. The probability that three friends, Al, Bob, and Carol, will be assigned to the same lunch group is approximately

中学的 600 名学生被平均分成三组用午餐。每组在不同的时间用餐。一台计算机随机将每名学生分配到三个午餐组之一。三个朋友 Al、Bob 和 Carol 被分到同一午餐组的概率大约是

A. $\displaystyle \frac{1}{27}$
B. $\displaystyle \frac{1}{9}$
C. $\displaystyle \frac{1}{8}$
D. $\displaystyle \frac{1}{6}$
E. $\displaystyle \frac{1}{3}$

正确答案 · Correct Answer

B

解析 · Solution

解析整理中

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