If P(A)=0.4P(A) = 0.4P(A)=0.4, P(B)=0.5P(B) = 0.5P(B)=0.5, and P(A∩B)=0.1P(A \cap B) = 0.1P(A∩B)=0.1, what is the probability P(Ac∣Bc)P(A^c | B^c)P(Ac∣Bc)?
0.2
0.4
0.6
0.5