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Semesta dua buah dadu = 6 * 6
= 36
mata dadu kurang dari 9
= ( {1,1}{1,2}{1,3}{1,4}{1,5}{1,6}{2,1}{2,2}{2,3}{2,4}{2,5}{2,6}{3,1}{3,2}{3,3}{3,4}{3,5}{4,1}{4,2}{4,3}{4,4}{5,1}{5,2}{5,3}{6,1}{6,2} )
= 26 kejadian
peluang = 26 / 36
= 13 / 18
A = {{1,1},{1,2},{1,3},{1,4},{1,5},{1,6},{2,1},{2,2},{2,3} , {2,4},{2,5},{2,6},{3,1},{3,2},{3,3},{3,4},{3,5},{4,1},{4,2},{4,3},{4,4},{5,1},{5,2},{5,3},{6,1},{6,2}}
n(A) = 26