If P(A∣B)=0.4P(A|B) = 0.4P(A∣B)=0.4 and P(B∣A)=0.2P(B|A) = 0.2P(B∣A)=0.2, what is the ratio P(A)/P(B)P(A)/P(B)P(A)/P(B)?
0.5
1
2
0.25