How many words can be formed by arranging the letters of the word ‘ARRANGEMENT’, so that the vowels remain together?

To find: number of words where vowels are together


Vowels in the above word are: A,A,E,E


Consonants in the above word: R,R,N,G,M,N,T


Let us denote the all the vowels by a single letter say Z


the word now has the letters, R,R,N,G,M,N,T,Z


R and N are repeated twice


Number of permutations =


Now Z is comprised of 4 letters which can be permuted amongst themselves


A and E are repeated twice


number of permutations of Z =


Total number of permutations =


The number of words that can be formed is 60480


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