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Boxes $$A, B$$, and $$C$$ each contain colored pencils. Box $$A$$ contains $$7$$ pencils, $$3$$ of which are red. Box $$B$$ contains $$6$$ pencils, $$4$$ of which are red. Box $$C$$ contains $$7$$ pencils, $$4$$ of which are red. One pencil is to be selected at random from each box. What is the probability that at least $$1$$ of the $$3$$ pencils selected will be red?
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· 相关考点
6.4.3 独立事件 6.4.1 古典概率
6.4.3 独立事件
6.4.1 古典概率
以上解析由 考满分老师提供。
