p&C

If 23 people sit around a round table,then prove that the unfavourable chance ratio of two particular pesons sitting together is 10:1

1 Answers

fix the first person..

no of ways second can sit next is 2..

no of ways he cannot sit next is 23-2-1 = 20 (-2 for the two neighboring seats) and (-1 for the seat in whihc the first person is sitting)

So the ratio is 1:10

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