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NDA2015MathematicsPermutation and CombinationActual

How many words can be formed using all the letters of the word ‘NATION’ so that all the three vowels should never come together?

Options

  1. A354
  2. B348
  3. C288
  4. DNone of these

Correct answer

C. 288

Step-by-step solution

The given word is 'NATION'. Total number of words that can be formed from given word 'NATION' = 6! 2! = 6 5 4 3 2! 2! =360 Now numbers of words that can be formed from given word 'NATION', so that all vowels never come together. aligned & =360- [4! 3! 2! ] & =360-[24 3] & =360-72=288 aligned Option (C) is correct.

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