SOLUTION: How many 5 digits number can be formed using the digits 1,2,3,4,5,6,7. If repetition is not allowed

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Question 1181516: How many 5 digits number can be formed using the digits 1,2,3,4,5,6,7. If repetition is not allowed
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


7 choices for the first digit;
then 6 choices for the second;
...;
and 3 choices for the 5th and last digit.

ANSWER: 7*6*5*4*3 = 2520