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Permutations and Combinations
Question
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How many words can be formed by using the letters of word ‘VOWELS’ if 
(a) there is no restriction on letters?
(b) each word begins with E?
(c) each word begins with E and ends with L?
(d) the vowels are together?
(e) all consonants come together?

Answer

Solution not provided.
Ans. (a) 720 (b) 120 (c) 24 (d) 240 (e) 144

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