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posted by  pieri on 10/5/2008 1:55:36 PM  |  status: Live  

probability question!!need help please!

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A commercial building has four entrances, numbered I,II,III,IV. Three people enter the building at 9:00 a.m. Let X denote the number who selected entrance I. Assuming that the people choose entrances independently and at random, find the probability distribution for X. Were any additional assumptions necessary for your answer?

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