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A and B are two events such that `P(A)!=0.` Find `P(B|A)` , if (i) A is a subset of B (ii) `AnnB=varphi`

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(i) If A is subset of B, then A∩B=A
P(A∩B)=P(A) Thus `P(B/A)=(P(A))/(P(A)​)=1`
(ii) If A∩B=Φ, then P(A∩B)=0 So` P(B/A)=0/(P(A))​`=0
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