Question 1116686
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How many four-letter "words" can be made from 6 letters "AEBWDP" if


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repetition of letters is allowed         {{{6^4}}}     = 1296 ways;

                                         6 opportunities in each of 4 positions.



repetition of letters is not allowed     {{{6*5*4*3}}} = 360 ways.

                                         6, 5, 4 and 3 opportunities in the 1-st, 2-nd, 3-rd and 4-th position, respectively.
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Solved.