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  • Question
  • In how many ways the letters of the word 'CIRCUMSTANCES' can be arranged such that all vowels came at odd places and N always comes at end?


  • Options
  • A. 1,51,200 ways.
  • B. 5,04,020 ways
  • C. 72,000 ways
  • D. None of the above

  • Correct Answer
  • 1,51,200 ways. 

    Explanation

    In circumcstances word there are 3C's, 2S's, I, U,R, T, A, N, E

    Total = 13 letters

    But last letter must be N

    Hence, available places = 12

    In that odd places = 1, 3, 5, 7, 9, 11

    Owvels = 4

    This can be done in 6P4 ways 

    Remaining 7 letters can be arranged in 7!/3! x 2! ways

     

    Hence, total number of ways = 6P4 x 7!/3! x 2! = 360 x 5040/12 = 1,51,200 ways.

  • Tags: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO

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