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How Many Different Words Can Be Formed from the Letters of the Word 'Ganeshpuri'? in How Many of These Words:The Vowels Are Always Together? - Mathematics

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Question

How many different words can be formed from the letters of the word 'GANESHPURI'? In how many of these words:

the vowels are always together?

Solution

The word GANESHPURI consists of 4 vowels. If we keep all the vowels together, we have to consider them as a single entity.
So, we are left with the remaining 6 consonants and all the vowels that are taken together as a single entity. This gives us a total of 7 entities that can be arranged in 7! ways.
Also, the 4 vowels can be arranged in 4! ways amongst themselves.

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Factorial N (N!) Permutations and Combinations
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Chapter 16: Permutations - Exercise 16.4 [Page 37]

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RD Sharma Mathematics [English] Class 11
Chapter 16 Permutations
Exercise 16.4 | Q 6.1 | Page 37

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