Question 927823:   How many different 10 letter words (real or imaginary) can be formed from the following letters T, Y, A, G, N, K, Y, Q, I, U 
 Answer by KMST(5328)      (Show Source): 
You can  put this solution on YOUR website! Using the   items   ,   ,   ,   ,   ,   ,   ,   ,   ,   , 
you can make   ordered sequences (permutations) of   characters. 
However, if you cannot distinguish   from   , 
pairs of sequences where   and   appear in different order will look the same, 
and you will only see half as many sequences: 
  
 
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