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Rumor Rithmetic (Posted on 2008-04-25) Difficulty: 2 of 5
You start a rumor by telling it to n people and each of them tells it to another n-1 people. If each of these people, in turn, tells the rumor to another n-2 people, and so forth with no person hearing the rumor from more than one source, find a closed-form expression (in terms of n) for the total number of people that have been told the rumor.

No Solution Yet Submitted by Dennis    
Rating: 2.0000 (3 votes)

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  Subject Author Date
re(2): computer aided solution (spoiler)K Sengupta2008-04-26 06:15:04
re: computer aided solution (spoiler)Dej Mar2008-04-25 23:33:23
Solutioncomputer aided solution (spoiler)Charlie2008-04-25 16:09:17
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