Question

How many arrangements of 3 digits can be formed from the digits 0 through 9?

1,000
729
720

I got 504.....

Answer 1

@sugarplum15 @nincompoop can you help?

Answer 2

@Christian_10_

Answer 3

how'd you get 504?

Answer 4

I think of it like this. How many numbers are there between 0 and 999, inclusive?

Answer 5

I used permitation. P(n-r)=[P(n,r)=\frac{ n! }{ (n-r)! }\]

Answer 6

So I put 9 as n