Posted by Jacob on Friday, April 5, 2013 at 12:01am.
How many three digit numbers have three distinct digits?

Geometry  Anonymous, Friday, April 5, 2013 at 12:03am
1st digit: 9 choices
2nd digit: 9 choices
3rd digit: 8 choices
so, 9*9*8

Geometry  Jacob, Friday, April 5, 2013 at 12:11am
Actually not because the problem is asking for 3 digits such as 100

Geometry  Jacob, Friday, April 5, 2013 at 12:13am
Sorry made a mistake you are right
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