Grade 12th passAlgebra
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?
1 Answer
Vijay Mukati
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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