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Question

How many words can be made out from the letters of the word INDEPENDENCE. in which vowels always come together

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Solution

Dear student,

In word INDEPENDENCE, There are 12 letters are there.Out of 12 letters 7 are consonants and 5 vowels are there.If all vowels will come together, then we will consider all vowels as 1 letter.So now there will be total 7+1=8 lettersNow there are two D, three N, one P, and one C and one set of vowelsSo total numbers of words possible by taking all these 8 characters=8!2!×3!×1!×1!×1!=8!3!×2!Now coming to the vowels part, there are four E and one I.So the numbers of words possible by taking all these vowels=5!4!×1!=5!4!So the total number of possible words by taking letters of INDEPENDENCE=8!3!×2!×5!4!=(8×7×6×5×4×3!)×(5×4!)3!×4!×2=16800

Regards,

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