in how many ways a letter of word "invisible "be arranged such that all vowels are together
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Answer:
given :
word : INVISIBLE
total letter : 9 ( note 3 is common so divide by 3! )
consonants : 5 ( N,V,S,B,L )
vowels : 4 ( i,i,i,e )
Answer :
vowels together = 4! × 6! / 3!
= 4 × 6!
= 2880
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