Given P(A)=0.5,P(B∣A)=0.4,P(B∣Ac)=0.2P(A)=0.5, P(B|A)=0.4, P(B|A^c)=0.2P(A)=0.5,P(B∣A)=0.4,P(B∣Ac)=0.2, what is P(Ac∣B)P(A^c|B)P(Ac∣B)?
0.1/0.3
0.2/0.3
0.3/0.5
0.2/0.5