I am trying to figure out how many ways 20 beads can be placed around a necklace, but i'm not really sure where to start.
Could someone give me a hint on this?
my thought is that it is 20! / 20
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If we arrange twenty persons around a circular table, that can be done in ways.
But with beads on a necklace we can view it from two sides.
That is to say if we had three beads: red, green, & blue.
There would be only one necklace. is the same as
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