In a class, there are n students including the students P and Q. What is the probability that P and Q sit together if seats are assigned randomly?

NDA 2023 Mathematics question

In a class, there are students including the students and . What is the probability that and sit together if seats are assigned randomly?

Answer: (B)

Seat the students in a row: total arrangements . For and together, treat them as one unit: arrangements of

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Question ID VK-029765