Hi all,
   
  Suppose I have a population of 3 alphabets : A, B, C. From this population, number of ways that any 2 can be chosen is 3 i.e. AB, AC, and BC.
   
  Is there any R function to generalize this process, for any number of alphabets/numbers and for any sub-sample size?
   
  Thanks and regards,
   

       
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