Permutation or Combination

[theun4given]

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I am a bit confused about when to use the permutation formula and when to use the combination formula by the wording of certian problems. Any tips out there?

Thanks.

 

[HeatingHomer]

How many different ways can seven horses finish a race? That's combination.

Wouldn't this be just 7! ?

 

[sacjumpman]

http://forums.studentdoctor.net/showthread.php?t=143377

Go down to the 21st post.

Excellent explanation by Streetwolf.

 

[theun4given]

thanks guys