The number of six letter words (with or without meaning), formed using all the letters of the word ′VOWELS′, so that all the consonants never come together, is
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Solution
Total possible words =6!=720
When 4 consonants are together (V,W,L,S)
Total case when consonants are together O,E,VWLS
Such cases =3!⋅4!=144
Required cases =720−144=576