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Chetan Suryawanshi posted an Question
May 16, 2020 • 20:03 pm 30 points
  • IIT JAM
  • Physics (PH)

69. p and q sit in a ring arrangement with 10 persons. what is the probability that p and q will sit together?

69. P and Q sit in a ring arrangement with 10 persons. What is the probability that P and Q will sit together?

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    Ruby negi

    you have to remember that to arrange n no. of persons in a ring is always (n-1)!... this page help you to understand.

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  • comment-profile-img>
    Chandra prakash

    total no of person is 12 ,... P and Q and 10 other

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    Chandra prakash best-answer

    wherever the first person sits in the ring, there are only two sits next to him (right and left). So the solution is always 2/(N-1) where N is the total number of people in the ring..

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    Dhairya sharma

    p and q are with 2 person so total no of person will be 4. and the no of arrangement is n!

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