###### Asked in Math and Arithmetic, Statistics

Math and Arithmetic

Statistics

# How many combinations of the numbers 1 2 and 3 using each digit only can I get?

## Answer

###### Wiki User

###### 10/10/2008

If you **must** use each digit once, and only once, then
there are 3 ways to pick the first digit, and 2 way to pick the
second. This then leaves only 1 number available for third place,
so there is no choice for it. 3 multiplied by 2, multiplied by 1 =
6

123

132

213

231

312

321

If you don't **have** to use each digit very time, but still
cannot repeat a digit then there are 9 extra choices available.
012

013 021

023 031

032 001

002

003

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