probability
回答 (2)
2007-01-07 7:33 am
45个号码内选6个，Combination = 45!/(6! x 39!)份之一
= 6!x 39!/45!
= 6!x 39!/45!
收錄日期: 2021-05-03 05:58:14
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070106000051KK05604