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[(1 - 1/2) * (1 - 1/3)]*(1 - 2/4)
(1/2 * 2/3) * (1/2)
(1 - ) * (1/2)
(1 - 3/2) * (1/2)
(-1/2 * 1/2)
1 -
1 - (-1)
1+1 = 2
jawabannya 2