In how many ways, can 24 persons be seated around a circular table if there are is 13 seats?

First , we select 13 persons out of 24 persons in ²⁴ C₁₃ ways.
Now, these 13 persons can be seated in 12! ways around a table .
So required number of ways = ²⁴ C₁₃ x 12!
= [24! / {13!(24 - 13)!}] x 12!
= [24! / {13! x 11!}] x 12!
= 24! / (13 x 11!)