SOLUTION: How many 3-digit numbers greater than 300 are there that have different digits?

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Question 868324: How many 3-digit numbers greater than 300 are there that have different digits?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
7*9*8
0, 1, 2 cannot be in first place
3 through 9 can be in the first place
9 out of ten can be in the second place.
8 digits can be in the third place.