Question

if A and B are two such events such that P(A)+P(B)- P(AnB) =P(B),then which is true:
(1) P(B/A)=1 (2)P(A/B)=1
(3)P(B/A)=0 (4)P(A/B)=0​

Answer 1

Answer:

4 is the answer for that question