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- 帖子
- 232
- 主题
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- 注册时间
- 2011-5-24
- 最后登录
- 2012-9-12
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Hello everyone,
I'm learning counting methods right now, and while I conceptually understand factorials, combinations (nCr), and permutations (nPr), I'm having a hard time understanding the theory/concept behind the "multiplication rule of counting" and "labeling".
If anyone could spare the time to explain it to me, that would be greatly appreciated.
thanks! |
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发表于 2011-7-11 17:32
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