懂概率的高手请进,帮忙解答一下,急求!1.一组数字,5进制,8位,多少个组合?2.把这所有的组合随机分配给15亿人,(用求平均值的算法),那么,出现任何4位相同数字的人有多少个?3.有4位相同数字
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![懂概率的高手请进,帮忙解答一下,急求!1.一组数字,5进制,8位,多少个组合?2.把这所有的组合随机分配给15亿人,(用求平均值的算法),那么,出现任何4位相同数字的人有多少个?3.有4位相同数字](/uploads/image/z/7612508-20-8.jpg?t=%E6%87%82%E6%A6%82%E7%8E%87%E7%9A%84%E9%AB%98%E6%89%8B%E8%AF%B7%E8%BF%9B%2C%E5%B8%AE%E5%BF%99%E8%A7%A3%E7%AD%94%E4%B8%80%E4%B8%8B%2C%E6%80%A5%E6%B1%82%211.%E4%B8%80%E7%BB%84%E6%95%B0%E5%AD%97%2C5%E8%BF%9B%E5%88%B6%2C8%E4%BD%8D%2C%E5%A4%9A%E5%B0%91%E4%B8%AA%E7%BB%84%E5%90%88%3F2.%E6%8A%8A%E8%BF%99%E6%89%80%E6%9C%89%E7%9A%84%E7%BB%84%E5%90%88%E9%9A%8F%E6%9C%BA%E5%88%86%E9%85%8D%E7%BB%9915%E4%BA%BF%E4%BA%BA%2C%EF%BC%88%E7%94%A8%E6%B1%82%E5%B9%B3%E5%9D%87%E5%80%BC%E7%9A%84%E7%AE%97%E6%B3%95%EF%BC%89%2C%E9%82%A3%E4%B9%88%2C%E5%87%BA%E7%8E%B0%E4%BB%BB%E4%BD%954%E4%BD%8D%E7%9B%B8%E5%90%8C%E6%95%B0%E5%AD%97%E7%9A%84%E4%BA%BA%E6%9C%89%E5%A4%9A%E5%B0%91%E4%B8%AA%3F3.%E6%9C%894%E4%BD%8D%E7%9B%B8%E5%90%8C%E6%95%B0%E5%AD%97)
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