IPMAT Rohtak 2020 (QA) - Can you calculate in how many ways can 7 tennis players can be seated in a circular order? | PYQs + Solutions | AfterBoards
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IPMAT Rohtak 2020

Modern Math
>
Permutation & Combination

Easy

Can you calculate in how many ways can 7 tennis players can be seated in a circular order?

Correct Option: 3
For circular arrangement of n distinct objects, the formula is (n−1)!(n-1)!
Here, n = 7
Therefore, number of ways = (7−1)!(7-1)!\newline= 6!6!\newline= 6×5×4×3×2×16 × 5 × 4 × 3 × 2 × 1\newline= 720720
The answer is 720 ways.
(Note: We use (n-1)! instead of n! because in circular arrangement, all rotations of a particular arrangement are considered the same)

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