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How many combinations can be made from a 12 set string of letters and number that can be repeated and used more than once in any order. Ie- TD3GD3BK6K7T and would be different than T7K6KB3DG3DT or KKTT733DDGB6.

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closed as off-topic by choco_addicted, user228113, Chris Godsil, colormegone, Daniel W. Farlow Apr 15 '16 at 3:21

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  • $\begingroup$ caps and small letters or just caps? $\endgroup$ – MaxW Apr 15 '16 at 0:44
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    $\begingroup$ $36^{12}$ $ $ $ $ $\endgroup$ – Kaster Apr 15 '16 at 0:44
  • $\begingroup$ All caps I guess k=K. Thanks! $\endgroup$ – User122112 Apr 15 '16 at 0:48
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Each character in the string can be any one of the (26+10) possible characters. So there are $36^{12}$ possible combinations.

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