The number of ways in which n different things can arrange in a circle if clockwise and anti-clock-wise orders are different is ______.

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(n-1)!

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(n-2)!

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Solution

The correct option is B
(n-1)!

To arrange n things in circle, first fix position of 1 thing and then arrange the remaining (n-1) things with respect to that one fixed thing.

Since order of clockwise and anti-clock-wise orders are different, (n-1) things can be arranged in (n-1)! Ways.

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The number of ways in which n different things can arrange in a circle if clockwise and anti-clock-wise orders are different is ______.

The correct option is B (n-1)! To arrange n things in circle, first fix position of 1 thing and then arrange the remaining (n-1) things with respect to that one fixed thing. Since order of clockwise and anti-clock-wise orders are different, (n-1) things can be arranged in (n-1)! Ways.

The correct option is B
(n-1)!

To arrange n things in circle, first fix position of 1 thing and then arrange the remaining (n-1) things with respect to that one fixed thing.

Since order of clockwise and anti-clock-wise orders are different, (n-1) things can be arranged in (n-1)! Ways.