n(>or=3) persons are sitting in a row.if 2 of them are selected at random the probability that they are not together is a)n-2/n b)2/n+1 c)n-1/n d)n-1/n+1

Asked by Lekha | 25th Aug, 2012, 07:31: PM

Expert Answer:

Answered by  | 27th Aug, 2012, 10:07: AM

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