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#1 2008-03-21 21:57:38
- chetah
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- Registered: 2008-02-15
- Posts: 32
Discrete Maht
In how many ways can the symbols a, b, c, d, e, e, e, e, e be arranged so that no e is adjacent to another e?
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#2 2008-03-22 00:09:09
- JaneFairfax
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- Registered: 2007-02-23
- Posts: 6,868
Re: Discrete Maht
The only way to part the es apart is to put a letter between every two of them, which can be done in only one way:
Hence the answer to your question is 4!.
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