(3 votes, average: 4.00 out of 5)How many different 4 letter words can be formed that have at least one vowel?
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Click here to See SolutionWords with atleast one vowel = All possible 4 letter words – words with no vowel
= (26*26*26*26) – (21*21*21*21) = 262495
26 because there are total 26 alphabets
21 because there are total 21 non vowels(consonants) (26 -5(vowels))
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