# What are Permutations?

What are Permutations?
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Step 1
All six permutations of $\left\{a,b,c\right\}$ are:
$\left\{abc,acb,bac,bca,cab,cba\right\}$
Step 2
Also, all 6 permutations of $\left\{a,b,c\right\}$ chosen at 2 items at a time are
$\left\{ab,ba,ac,ca,bc,cb\right\}$