The Dragonvale 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?
A. 2
B. 4
C. 5
D. 6
E. 12

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Worked solution

1. 2015 AMC 8 官方解析

排队问题：男女女女男。2 名男孩有 $2 \times 1 = 2$ （种）排法，3 名女生有 $3 \times 2 \times 1 = 6$ （种）排法，共有 $2 \times 6 = 12$ （种）排法。

Answer

E. 12

AI analysis — may contain mistakes.

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