Wednesday, 12 November 2014

M-PnC 01

The no: of ways of painting the six faces of a cube with six different given colours is..........

2 comments:

  1. For the moment assume the faces are enumerated from #1 to #6, there are
    6! = 1 * 2 * 3 * 4 * 5 * 6 = 720
    ways (permutations) to paint 6 things with 6 different given colours .

    However, as repetitions (aided by rotation) are not to count towards our total the colours are limited by the number of possible rotations for each face; namely, 4.
    Therefore, the answer is 6!/4! = 720/24= 30

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