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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。