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Question

The number of ways in which the letters of the word Article can be arranged so that even places are always occupied by consonants is


A

576

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B

4C3×4!

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C

2×4!

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D

None of these

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Solution

The correct option is A

576


There are 3 even places in the 7 letter word ARTICLE.

So, we have to arrange 4 consonants in these 3 places in 4P3 ways.

And the remaining 4 letters can be arranged among themselves in 4! ways,

Total number of ways of arrangement =
4P3×4!=4!×4!=576


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