SOLUTION: In how many ways can 20 board members sit in a circular boardroom if the chairman must sit between the secretary and the treasurer?
Algebra.Com
Question 1071974: In how many ways can 20 board members sit in a circular boardroom if the chairman must sit between the secretary and the treasurer?
Answer by ikleyn(52798) (Show Source): You can put this solution on YOUR website!
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17! * 2.
Permutations that differ by any rotation around the center of the table, are considered as equivalent (they are considered as non-distinguishable).
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