SOLUTION: How many permutations of 3 digits (if they must be different) are there from the numbers 0-9?

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Question 944506: How many permutations of 3 digits (if they must be different) are there from the numbers 0-9?
Answer by dkppathak(439) About Me  (Show Source):
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How many permutations of 3 digits (if they must be different) are there from the numbers 0-9?
unit place tens place and hundred place to be used with 0 to 9 number
hundred place 0 can not be used so to fill up hundred place options are 9
tens place 9 and unit place is 8
so total permutation will be 9x9x8=81x8=648