1.

यदि `(If) P(A)=6/11, P (B)=5/11` और (and)`P(AuuB)=7/11` तो ज्ञात कीजिए `(i)P(AnnB)" "(ii)P(A//B)" "(iii)P(B//A)`

Answer» (i ) प्रायिकता के योग प्रमेय से, `P(AuuB)=P(A)+P(B)-P(AnnB)`
`therefore(7)/(11)=(6)/(11)+(5)/(11)-P(AnnB)" "impliesP(AnnB)=1-(7)/(11)=(4)/(11)`
(ii) परिभाषा से, `P (A//B)=(P(AnnB))/(P(B))=(4//11)/(5//11)=4/5`
(iii) फिर `P (B//A)=(P(AnnB))/(P(B))=(4//11)/(6//11)=2/3.`


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