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Jika ada rule ketiga yang ditambahkan, maka: CF(R1,R2,R3) = CF(R1,R2) + CF(R3) [1 - CF(R1,R2)],Misalnya:R3: IF bond prices increases, THEN stock market prices goup (CF = 0.85) Jika diasumsikan semua rule pada bagian IF bernilaiTRUE maka, peluang stock prices will increase adalah:CF(R1,R2,R3) = 0.88 + 0.85 (1 - 0.88) = 0.88 + 0.85 (.12)= 0.982 catatan: bond = surat obligasistock = sahamunemployment = PHK