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Question

Find the number of ways in which the letters of the word AEROPLANE can be arranged such that the vowels are always together.

A
5!2!
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B
5!2!2
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C
5!22!2
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D
9!2!2
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Solution

The correct option is C 5!22!2
AEROPLANE Total number of letters =9
Vowels - 2A,2E,1O
Considering all vowels as a single letter, we are left with 5 letters
They can be arranged in 5! ways
Now vowels can be arranged among themselves in 5!2!.2!
So required number of ways =5!22!2=3600

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