Two Plus Two Older Archives - probability question.

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SNOWBALL138

04-30-2005 07:25 AM

probability question.

If there is a 33.1% chance an event will happen, what are the chances that it will not occur 17 times in a row?

elitegimp

04-30-2005 10:51 AM

Re: probability question.

Since there is a .331 chance that an event happens (100% = 1), the probability it does not happen is 1-.331 = .669 (because an event either happens or doesn't happen so P(event) + P(no event) = 1).

To not happen 17 times in a row, assuming independence, the probability would be .669^17 = 0.001077 or .1077%, about 1/928.5

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