in how many ways can 13 beads be arranged in a necklace
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13x12x11x10x9x8x7x6x5x4x3x2x1 or 13!
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Final Answer :12!/2
Since, it doesn't matter where we place the first bead ,then number of ways of arranging the other beads are 12!.
Or we can say that no. of circular permutations of 13 beads in a necklace is (13-1)!=12!.
But, considering the fact that the beads doesn't have differentiation between left and right, we divide 12! /2 .
So, Final answer will be 12!/2 .
Since, it doesn't matter where we place the first bead ,then number of ways of arranging the other beads are 12!.
Or we can say that no. of circular permutations of 13 beads in a necklace is (13-1)!=12!.
But, considering the fact that the beads doesn't have differentiation between left and right, we divide 12! /2 .
So, Final answer will be 12!/2 .
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