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Question

Four married couples are to be seated in a row having 8 chairs. The number of ways so that spouses are seated next to each other is

A
72
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B
186
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C
384
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D
516
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Solution

The correct option is D 384
Arrange four couple ( both together) in 4! ways
and arrange themselves in 2! ways each
Hence total number of arrangements =4!(2!)4=2416=384

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