Question
Sat September 12, 2009 By:

Concept of finding no of arrangements in necklace and garland cases

Expert Reply
Mon October 05, 2009

these are the cases of circular permutations

There are two cases of circular-permutations:-

(a)       If clockwise and anti clock-wise orders are different, then total number of circular-permutations is given by (n-1)!

(b)       If clock-wise and anti-clock-wise orders are taken as not different, then total number of circular-permutations is given by  (n-1)!/2!

In case of beads  clock-wise and anti-clockwise arrangement s are same.

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