AMC 8 1997 Problem 9

AMC8 1997 年第 9 题

概率★★☆☆☆

Three students, with different names, line up single file. What is the probability that they are in alphabetical order from front-to-back?

三个名字各不相同的学生排成一列。他们从前到后按字母顺序排列的概率是多少？

A. $\dfrac{1}{12}$
B. $\dfrac{1}{9}$
C. $\dfrac{1}{6}$
D. $\dfrac{1}{3}$
E. $\dfrac{2}{3}$

正确答案 · Correct Answer

C

解析 · Solution

解析整理中

继续练习

免费刷 1997 整卷 →登录解锁诊断（看你哪儿弱）→