In how many ways can 13 members of a school sit along a circular table, when the teacher is to sit on one side of the principal and the secretary on the other side?

  1. 10! × 2
  2. 24
  3. 13! × 2
  4. 26

Answer (Detailed Solution Below)

Option 1 : 10! × 2
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Detailed Solution

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Explanation:

Since, total members are 13 but three special members which must be consider as one member.

Therefore, required number of arrangements are 10! × 2, because principal remains between the two specified persons which can sit in two ways.

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