SOLUTION: How many different four-letter words can be formed from the letters: a,b,c,d,e,f, and g if no repetition of letters is allowed ?
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Question 382947: How many different four-letter words can be formed from the letters: a,b,c,d,e,f, and g if no repetition of letters is allowed ? Answer by edjones(8007) (Show Source):
You can put this solution on YOUR website! nPr=Permutations of n things taken r at a time=n!/(n-r)!
7!/3!
=7*6*5*4*3!/3!
=7*6*5*4
=840
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Ed
