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m_mayurprabhu m_mayurprabhu is offline
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Probability - 24-05-2004, 11:25 AM
PLease solve this:-

13 persons take their places at a round table. What is teh probability that 2 particular persons do not sit together?


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Re: Probability - 24-05-2004, 11:32 AM
13 ppl can sit on round table in 12! ways

if 2 ppl have to sit together we have
2 x 11! ways (see any standard book for these proofs)

the 2 donot sit together


12! - 2x 11! ways

(to check the options ... 12! = 12x 11! so cud also be 10 x 11!)

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Re: Probability - 25-05-2004, 02:30 AM
Mayur same Question .....thr too :P ....got??
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nitin
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25-05-2004, 11:17 PM
2 ppl are counted as 1?

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