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How do I work out this statistical problem ?

Asked by inunsure (423points) February 19th, 2012

The chances of getting chips on any given day is generated by a random number generator from 0–9

There are 10 5 day weeks in a term, what are the chances of getting chips twice on any three weeks in the term?

This is not homework but was a homework question for a younger friend but I had no idea how to answer it.

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