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Five couple are to line up for a photograph. In how many ways can they be arranged such that husbands must be next to their wives?

Respuesta :

Answer:

Step-by-step explanation:

Considering a couple to be a single object i.e. 2 people as 1

In this way there are 5 object

No of ways in which 5 objects can be arranged is 5!

Husband and wife can be arranged in 2! ways

so total no of ways such that husband must be next to their wives

is [tex]=2!\times 5![/tex]

[tex]=240\ ways[/tex]      

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