How many necklaces can be formed of 7 distinct beads? Necklaces can be rotated and/or flipped over; all beads must be used.
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Since it doesn't matter where you place the first bead, the number of ways of arranging the other beads = 7!7!
But considering the fact that the beads doesn't have a differentiation between left/right, the final answer would be:
7/2.
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