Practicing Success
In how many different ways can the letters of the word BANKING be arranged in such a way that the vowels always come together? |
120 240 360 720 |
720 |
The given words contains 7 letters of which N is taken 2 times. We keep the vowels (AI) together and treat them as 1 letter. Thus, we have to arrange 6 letters BNKNG (AI) of which N occurs 2 times and rest are different. These can be arranged in 6!2!6!2! = (6 × 5 × 4 × 3 ) = 360 days Now 2 vowels (AI) can be arranged among themselves in 2 ways. ∴ Required number of ways = (360 × 2) = 720 |