How many 7 letter words can be formed such that all the vowels are not together?
Explanation:
Total number of words = 7! = 5040. (From 1st question)
Number of words where all the vowels are together = 720 ways.
∴ Number of words that can be formed such that all the vowels are not together = 5040 – 720 = 4320.
Hence, 4320.
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