19no its n! because its a half circle....not a full circle !
4 Answers
1@sinchan
nishant sir is right........
in the first one it wont be like circulsr permutation as there is not
symmetry in the arrangment as a result u wont get repeated arrangments and hence answer has to be n!
in second case there is symmetry and hence many arrangments will repeat and hence answer is (n-1)!
62yes karna that is coreect..
btw .. there could be a very interesting question out of this if we were to make garlands of the shape 1 [1]