S = { M M M, M M T, M T M, T M M, M T T, T M T, T T M, T T T } X = {0, 1, 2, 3} X 0 1 2 3 Jml ( ) ( ) ( ) ( ) P(X) 1 2 3 4 1 ( ) ( ) ( ) ( ) 1 3 3 1 P(X) 1 8 8 8 8