If P(A)=0.4,P(B)=0.5,P(A∩B)=0.2P(A) = 0.4, P(B) = 0.5, P(A \cap B) = 0.2P(A)=0.4,P(B)=0.5,P(A∩B)=0.2, what is P(Ac∣Bc)P(A^c | B^c)P(Ac∣Bc)?
0.3/0.5
0.3/0.3
0.5/0.5
0.2/0.5