2015 AMC 8 第 4 题
先试着解答 2015 AMC 8 第 4 题，然后核对你的答案与视频与精心整理的解答，解答来自 LIVE by Po-Shen Loh。你也可以参加完整限时模拟考试、查看全部 2015 AMC 8 解答，或核对答案。
所有题目均经美国数学协会（MAA）官方合法授权使用。
4.
森特维尔中学国际象棋队由两名男生和三名女生组成。一位摄影师想为当地报纸拍一张队伍照片。她决定让他们坐成一排，两端各坐一名男生，中间坐三名女生。这样的排列有多少种？
The Centerville Middle School chess team consists of two boys and three girls. A photographer wants to take a picture of the team to appear in the local newspaper. She decides to have them sit in a row with a boy at each end and the three girls in the middle. How many such arrangements are possible?
小提示：
先把两名男生放在两端
Place the two boys at the two ends first.
大提示：
再排列中间三个座位上的女生
Then arrange the three girls in the middle seats.
视频讲解：
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文字解答：
两名男生坐在两端有 种方式。三名女生坐在中间三个座位有 种方式。
因此总排列数为 。
所以正确答案是 E。
There are ways to place the two boys at the two ends. There are ways to arrange the three girls in the middle seats.
Thus the total number of arrangements is
Thus, E is the correct answer.
其他年份的第 4 题
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