Disease Test

P(c)=0.1, P(¬c)=0.9
P(Pos|C)=0.9 P(Neg|C)=0.1
P(Neg|¬C)=0.5 P(Pos|¬C)=0.5

Test = Neg P(c, Neg)=0.01
P(¬c, Neg)=0.45
P(Neg)=0.46
P(c|Neg)=0.0217
P(¬c|Neg)=0.9783

Test = Neg P(c, Pos)=0.09
P(¬c, Neg)=0.45
P(Pos)=0.54
P(c|Pos)=0.167
P(¬c|Pos)=0.833