Red Faces of a Cube https://www.cut-the-knot.org/Probability/RedFaces.shtml … #FigureThat #math #probabilitypic.twitter.com/nZElMp3BO9
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N = 1, 6/6 N = 2, 3/6 N >= 3, 6*(n-2)^2/n^3*1/6+8/n^3*3/6+(n-2)^3/n^3*0/6+12*(n-2)/n^3*2/6 = Center faces (1 red side) + corners (3 red sides) + inner core (0 red sides) + sides ex-corners (2 red sides)