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A and B are two events such that P(A)!=0...

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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The correct Answer is:
N/a
(i) Given A is a subset of seb B i.e.
`AsubBimpliesAnnB=A`
`P(AnnB)=P(A)`
`impliesP(B/A)=(P(BnnA))/(P(A))=(P(A))/(P(A))=1`
(ii) Here `AnnB=phiimpliesP(AnnB)=0`
`:.P(B/A)=(P(BnnA))/(P(A))=0/(P(A))=0`
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