- Messages
- 1,394
- Reaction score
- 12,123
- Points
- 523
In the (ii) part first, separate the consonant and the vowels from the given word. You will get:
VOWELS: A, A, A, I
CONSONANTS: T, Z, N, N
Let VOWELS be represented by '*' and Consonants by 'O'
You are given in the question that the first letter is a Consonant, the second vowel and so on alternately, so arrange them in this way:
O * O * O * O *
^ These are the possible positions for the VOWELS and CONSONANTS. So now arrange them in these places. You can arrange the Consonants in this 4 places in 4! ways. There are two Ns so you'll divide 4! with 2!.
Similarly, the vowels can be arranged in 4! ways. There are 3As, so you'll divide by 3!.
Hence, the overall answer will become:
4!/2! * 4!/3!