Originally Posted by

**edmscan**
Thanks. That is funny .. I forgot that I did this, mind you it was sometime ago. I actually did it to see all the combinations for a combination lock that uses characters rather than numbers. It was just fun. I will definitely look at your file.

Speaking from a statistics viewpoint the numbers used to open a "combination" lock are a set of permutations, not a set of combinations. The name of the object, and I suppose the what we call the set of numbers, is actually a misnomer.

5, 10 15 is one combination of numbers. 10, 5, 15 is the same combination of numbers, although I grant it is not the same order when it comes to locks.

Using the same 3 digits 5, 10, 15:

5, 10, 15 is one permutation. The others are

5, 15, 10

10, 5, 15

10, 15, 5

15, 5, 10

15, 10, 5

If I haven't forgotten any, there are 6 permutations for 3 numbers taken 3 at a time.

The number of combinations for the set (3 taken 3 at a time) is one.

End of statistics 101.

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