简答题：(本小题满分l2分) 从一批含有13只正品，2只次品的产品中，不放回地抽取3次，每次抽取1只，用ξ表示抽到次品的次数．

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题目内容：

(本小题满分l2分)
从一批含有13只正品，2只次品的产品中，不放回地抽取3次，每次抽取1只，用ξ表示抽到次品的次数．
(1)求ξ的分布列
(2)求ξ的期望E(ξ)．

参考答案：

答案解析：

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