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Imagine 2 sets of 6 wires. How would I find how many possible connections there are?

Every wire must be used to be considered a connection.

//1st set
ABCDEF
GHIJKL

//2nd set
ABCDEF
HGIJKL

//visual layout of situation
0 1
0 1
0 1
0 1
0 1
0 1
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1 Answer 1

up vote 5 down vote accepted

I am not sure what you meant by the sets of wires, but assuming you have two stacks of six pieces of wires, like:

  • 1st: A,B,C,D,E,F
  • 2nd: G,H,I,J,K,L

Then A can be connected to 6 pieces (G,H,I,J,K,L), B to 5 (G,H,I,J,K,L except for one) and so on, so the answer could be 6!=720.

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I believe that's what we're looking for... what's the correct term for 6!? Like if I was to say it –  bradenkeith Jan 14 '11 at 14:15
    
@bradenkeith - factorial, see e.g. on Wikipedia (en.wikipedia.org/wiki/Factorial) –  daroczig Jan 14 '11 at 14:16
    
Awesome! Thank you! –  bradenkeith Jan 14 '11 at 14:18
2  
@Braden: Also look up permutations. –  Aryabhata Jan 14 '11 at 17:13
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