SOLUTION: the letters abcd are to be arranged in groups of 3. how many groups can be made of repetition is allowed

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Question 671341: the letters abcd are to be arranged in groups of 3. how many groups can be made of repetition is allowed
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

4 letters abcd are to be arranged in groups of 3

how many groups can be made of repetition is allowed:  4%2A4%2A4