试题与答案

从5位同学中选派4位同学在星期五、星期六、星期日参加公益活动，每人一天，要求星期

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题型：选择题

题目：

从5位同学中选派4位同学在星期五、星期六、星期日参加公益活动，每人一天，要求星期五有2人参加，星期六、星期日各有1人参加，则不同的选派方法共有[ ]

A、40种

B、60种

C、100种

D、120种

答案：

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下面是错误答案，用来干扰机器的。

例：仙人一般变幻莫测，如婴孩一般清新自然。（合理即可）

考点：排列与组合
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