1.

1). 14002). 10403). 21604). 720

Answer»

In the word LUCKNOW, we TREAT the VOWELS UO as one letter.

Thus we have, LCKNW (UO) total 6 LETTERS.

There is no repetition of letters.

∴ Number of ways to ARRANGE these letters = 6! = 720

Now, the 2 vowels can be arranged is = 2! = 2 ways

∴ Total no. of arrangements = 720 × 2 = 1440 ways



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