Multiple choice

In how many different ways can the letters of the word 'OPTICAL' be arranged, so that the vowels always come together?

  1. 5040

  2. 720

  3. 120

  4. 840

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Treat all the vowels as a single letter, i.e. 'OIA'.

The 5 letters can be arranged in 5! ways.

The vowels can be arranged among themselves in 3! ways.

So, the  required number of ways = 5! * 3! = 720

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