MathematicsFind the number of ways of preparing a chain with 6 different coloured beads

Find the number of ways of preparing a chain with 6 different coloured beads

  1. A

    50

  2. B

    60

  3. C

    70

  4. D

    80

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    Solution:

    The number of ways of preparing a chain with 6 different coloured beads

    =12(6-1)!=12×5!=12×120=60

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