演变2：依次任取k个不同的小于等于N的正整数，求其和为M的概率？

来源: 皆兄弟也于 2010-06-11 08:13:26 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.