SOLUTION: how many four digit numbers can be formed from the digits 1 2 3 4 5 6 0

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Question 714480: how many four digit numbers can be formed from the digits 1 2 3 4 5 6 0
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
1 2 3 4 5 6 0
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WITH REPEATS:
7*7*7*7=2,401 ANS.
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WITHOUT REPEATS:
7*6*5*4=840 ANS.