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Category > Statistics Posted 24 May 2017 My Price 3.00

A dormitory has n students, all of whom like to gossip

A dormitory has n students, all of whom like to gossip. One of the students hears a rumor, and tells it to one of the other n -1 students picked at random. Subsequently, each student who hears the rumor tells it to a student picked at random from the dormitory (excluding, of course, himself/ herself and the person from whom he/ she heard the rumor). Let pr be the probability that the rumor is told r times without coming back to a student who has already heard it from a dormitory mate. So p1 = p2 = 1, and pn =  0.

a)       Find a formula for pr for r between 3 and n – 1.

b)      Estimate this probability for n = 300 and r = 30.

Answers

Alpha Geek
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Status NEW Posted 24 May 2017 08:05 AM My Price 3.00

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file 1495615015-Answer.docx preview (153 words )
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