Question 1118501
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There are four possibilities for the units digit.  For each of these possibilities, there remain 6 ways to choose the 10s digit, so 24 ways to choose the 10s and units digits.  For each of these 24 possibilities, there are 5 ways to choose the 100s digit.  And so on.


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 4\ \times\ 6\ \times\ 5\ \times\ 4\ \times\ 3\ \times\ 2]


You can do your own arithmetic
								
								
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
{{n}\choose{r}}
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