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Question

In how many different ways can the letters of the word TRAINER be arranged so that the vowels always come together?

A
1440
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B
120
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C
720
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D
360
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Solution

The correct option is D 360
(D) Treating (AIE). i.e., all the vowels together as one letter. Therefore, the word capital,
i.e., TRNR (AIE) can be arranged in 5!2 ways.(since R is repeated)
Since (AIE) can also be arranged in 3! ways, therefore, required number of ways
=5!2×3!=120×62=360

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