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Seven persons are to be seated in a row. Find the probability that 2 particular persons sit next to each other.

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Seven persons are to be seated in a row. Find the probability that 2 particular persons sit next to each other. Select the correct answer from above options

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Here n(S) = 7! Let A: 2 persons sit next to each other. Let the 2 particular persons be together and 5 remaining people, totally 6 can be permuted in 6! ways and 2 particular persons they themselves can be permuted in 2! Ways. ∴ the number of ways is 6! And 2!.

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