1.

यदि `(If) P(A)=0.8, P(B)=0.5` और (and) `P(B//A)=0.4` तो ज्ञात कीजिए `(i) P(A nnB)" "(ii)P(A//B)" "(iii)P(AuuB)`

Answer» परिभाषा से,
`P(B//A)=(P(AnnB))/(P(A))implies0.4=(P(AuuB))/(0.8)impliesP(AnnB)=0.32`
(ii) पुनः `P (A//B)=(P(AnnB))/(P(B))=(0.32)/(5)=0.64`
(iii) प्रतिक्रिया के योग प्रमेय से, `P(AuuB)=P(A)+P(B)-P(AnnB)`
`therefore P(AuuB)=0.8+0.5-0.32=1.3-0.32=0.98`


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