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In how many ways can 20 persons be seated round a table if there are 9 chairs?

In how many ways can 20 persons be seated round a table if there are 9 chairs?

Grade:12th pass

1 Answers

Vijay Mukati
askIITians Faculty 2590 Points
7 years ago
Select 9 from the 20 persons which will be 20C9. Then to arrange the 9 persons on a round table, the number of arrange will be factorial(9-1). Therefore ans will be 20C9 * factorial (8). Thanks

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