Answers

2015-06-06T08:59:48+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
The number of ways in which N persons can be seated around a circular table is equal to  N! / 2.

Here we have 13 persons including Swati.   We want the number of ways in which a minimum of 10 persons:  ie., the number ways in which 10 persons can be seated +  number of ways in which 11 persons can be seated + ....

So:  [ 10! + 11! + 12 ! + 13 ! ] / 2
             = 1/2 * 10! [ 1 + 11 + 132 + 132* 13 ]
             =  864 * 10 !

1 5 1