Question

There are 12 "even" permutations of (1, 2, 3, 4), with an even number of exchanges. Two of them are (1, 2, 3, 4) with no exchanges and ( 4, 3, 2, 1) with two exchanges. List the other ten. Instead of writing each 4 by 4 matrix, just order the numbers.

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Permutations and Combinations

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