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【简答题】
某工厂有4个车间生产同一种产品,其产量分别占总产量的50%,20%,20%,10%,各车间的次品率依次为1%,2%,2%,3%. (1) 现在从出厂产品中任意取一件,问恰好抽到次品的概率是多少? (2) 现从出产产品中取出一件,发现是次品,问,它来自第一个车间的概率是多少?
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