Plug 4! (four factorial) into your calculator (scientific and above) and hit enter to give the answer 24
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No, sometimes they will be equal (when all items being permutated are all different, eg all permutations of {1, 2, 3} are distinguishable).
5 factorial is just a number .... namely, 120 . If you want to see all of the 120 'permutations' of five objects, simply do this: -- List all of the 5-digit numbers from 01,234 to 43,210. -- Cross off every number on the list that has any digit greater than 4 in it. -- Cross off every number on the list that has any repeated digit in it. You'll have all of the 120 permutations of the objects 0, 1, 2, 3, and 4, without repetition.
The first digit can be any one of 8. (all except '0' and '5')The second, third, fourth, fifth, and sixth digit can be any one of 9. (all except '5')The total number of possible permutations is (8 x 9 x 9 x 9 x 9 x 9) = 472,392
No, there are 1000 of them and I have better things to do with my life!
01234