Permutations and Combinations Questions

1:

Six teachers and six students have to sit round a circular table such that there is a teacher between any two students. The number of ways in which they can sit is

A.

6 ! x 6 !

B.

5 ! x 6 !

C.

5! x 5!

D.

none of these

 

Answer : D

Explanation :

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Option: A

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