Consider two events AAA and BBB where P(A)=0.4P(A) = 0.4P(A)=0.4 and P(B)=0.3P(B) = 0.3P(B)=0.3. If P(A∪B)=0.6P(A \cup B) = 0.6P(A∪B)=0.6, what is the probability P(Ac∣Bc)P(A^c | B^c)P(Ac∣Bc)?
5/7
2/3
3/4
4/7