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August 21, 2014

August 21, 2014

Posted by **Gaby** on Thursday, April 9, 2009 at 10:41am.

i do not undestand how to solve please help

- math -
**Damon**, Thursday, April 9, 2009 at 11:18amIt is not just a combination of 10 taken 6 at a time because the digits can be repeated, like 2 2 2 3 3 3

Also order matters

So

what is the chance of the first digit being right?

1/10

then the second one?

1/10 not 1/9 because we can use the same digit again

then the third?

1/10

and so on

so

(1/10)^6 = one out of a million

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