AMC 8 2008 Problem 14
AMC8 2008 年第 14 题
排列与组合★★★☆☆
Three , three , and three are placed in the nine spaces so that each row and column contain one of each letter. If is placed in the upper left corner, how many arrangements are possible?
把三个 A,三个 B 和三个 C 放置在九个空格中，使得每行和每列包含三个字母中的每一个字母。
如果 A 放置在左上角，那么一共有多少种安排方法？
- A.2
- B.3
- C.4
- D.5
- E.6
正确答案 · Correct Answer
C
解析 · Solution
Solution 1
Solution There are 2 ways to place the remaining , 2 ways to place the remaining , and 1 way to place the remaining for a total of (2)(2)(1) = 4.
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