Two events AAA and BBB have probabilities P(A)=0.5P(A) = 0.5P(A)=0.5 and P(B)=0.4P(B) = 0.4P(B)=0.4. If P(A∪B)=0.7P(A \cup B) = 0.7P(A∪B)=0.7, what is P(Ac∩Bc)P(A^c \cap B^c)P(Ac∩Bc)?
0.2
0.3
0.4
0.1