There are n-persons sitting in a row. Two of them are selected at random. The probability…
Mathematics · JEE Main · NTA Exams — Statistics and Probability
There are n-persons sitting in a row. Two of them are selected at random. The probability that two selected persons are not together, is
- \(\frac{2}{n}\)
- \(1-\frac{2}{n}\)
- \(\frac{n(n-1)}{(n+1)(n+2)}\)
- None of these
Answer
(B) 1- 2 n
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