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Dik :
P(A) = 0.6; P(A') = 1 - 0.6 = 0.4;
P(B) = 0.7; P(B') = 1 - 0.7 = 0.3;
P(C) = 0.8; P(C') = 1 - 0.8 = 0.2;
Peluang Ali lulus, Budi dan Charles tidak lulus :
P(A)*P(B')*P(C')
P(xA) = 0.6*0.3*0.2 = 0.036
P(A')*P(B)*P(C')
P(xB) = 0.4*0.7*0.2 = 0.056
P(A')*P(B')*P(C)
P(xC) = 0.4*0.3*0.8 = 0.096
P(A)*P(B')*P(C')
Peluang hanya 1 yang lulus :
P(xA) + P(xB) + P(xC)
0.036 + 0.056 + 0.096 = 0.188