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[7imz]

in how many way can i arrange the following set

{1,2,3,4,5,6,7}

is it 7!

 

[beerbelly]

Correct.

7! = 7 x 6 x 5 x 4 x 3 x 2 x 1 = 5,040

 

[tt_deeb]

7 x 6 x 5 x 4 x 3 x 2 x 1

 

[Loki]

Pretty sure that it's 7! (7 factorial), which would be 7*6*5*4*3*2*1, though I could definitely be wrong. It's been about 11 years since I did any of this stuff.


If you wanted to see how many ways you could arrange it while keeping, say, 2 numbers constant, it would be 7! divided by 2!, iirc.


Huge grain of salt here, though, as I said.


EDIT: I see above that I was correct. However, it goes to show you that I'm getting stupidererer as I age, since I took 7imz's "7!" as an exclamation (i.e., "OMG, IS IT SEVEN!?") rather than as 7 factorial (or 7-bang, as we used to say in soph year of HS ).