Question

Find the number of arrangements of the letters in the word BERMUDA so that consonants and vowels are in the same relative positions.

Answer 1

There are 7 letters in the word “BERMUDA” out of which 3 are vowels and 4 are consonants.
If relative positions of consonants and vowels are not changed.
3 vowels can be arranged among themselves in ³P₃ i.e., 3! ways. 
4 consonants can be arranged among themselves in ⁴P₄ i.e., 4! ways.
∴ Total no. of arrangements possible if relative positions of vowels and consonants are not changed = 4! × 3! = 24 × 6 = 144