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What is the probability that the number is more than 3,000 when forming four-digit integers out of 1, 2, 3 and 4 (no repeated number can be used)?
Give your answer as a fraction.
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· 相关考点
6.4.1 古典概率
6.4.1 古典概率
以上解析由 考满分老师提供。
