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[" A "&B" are two independent events suc...

[" A "&B" are two independent events such that "P(bar(A))=0.7,P(bar(B))=a&P(A uu B)=0.8" ,then "a=],[[" (A) "(5)/(7)," (B) "(2)/(7)," (C) "1," (D) None of these "]]

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