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Find the number of ways in which 12 diff...

Find the number of ways in which 12 different beads can be arranged to form a necklace.

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12 different beads can be arranged among themselves in a circular order in (12-1)!=11! Ways. Now, in the case of necklace, there is not distinction between clockwise and anti-clockwise arrangements. So the required number of arrangements=`(1)/(2)(11!)`.
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