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Old 09-26-2004, 04:52 PM   #12 (permalink)
Pragma
I am Winter Born
 
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Location: Alexandria, VA
It's impossible to have more than 100% probability.

If you're asking what is the probability of rolling at least one 2 in 10 rolls, one of the above posters had it right:

Take the total probability (1) and subtract the probability of rolling NO 2s. The math works out to be about an 83.8% probability of rolling at least one two, not quit as high as you had anticipated.
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