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Old 08-01-2007   #1
Tiago
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Default can someone please tell me how to solve this statistics problem?

i have been stuck on it for two days!A die is continuously rolled until the total sum of all rolls exceeds 225. What is the probability that at least 70 rolls are necessary? can someone please help me! thanks
 
Old 08-01-2007   #2
rmbrseptmbr11
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1/2 if you rolled the same number every time.
 
 

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