Questions on Algebra: Combinatorics and Permutations answered by real tutors!

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Question 166200: how many3-digit numbers can be formed by using the digits 1 to 9 if no digit is repeated?
: how many3-digit numbers can be formed by using the digits 1 to 9 if no digit is repeated?

Answer by checkley77(3848) About Me  (Show Source):
You can put this solution on YOUR website!
9*8*7=504 possible 3 digit numbers without repeats.
Question 166200: how many3-digit numbers can be formed by using the digits 1 to 9 if no digit is repeated?
: how many3-digit numbers can be formed by using the digits 1 to 9 if no digit is repeated?

Answer by edjones(2415) About Me  (Show Source):
You can put this solution on YOUR website!
9P3=9!/(9-3)!=9*8*7*6!/6!=504