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Byju's Answer
Standard XII
Mathematics
Circular Permutation
Find the no. ...
Question
Find the no. of ways in which
6
men and
5
women can sit at a round table so that no two women sit together?
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Solution
Since no conditions for men,
6
men can be arranged in
5
!
ways in a round table.
In between each man a woman is to be placed since no two women can be together.
There are
6
gaps between two men and
5
women are to be placed.
This can be done in
6
P
5
ways.
∴
the required number of arrangements
=
6
P
5
.5
!
=
6
!
.5
!
=
86
,
400
ways
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Write the number of ways in which 7 men and 7 women can sit on a round table such that no two women sit together.