P(A)=0.92, P(B)=0.3, P(B|~A) =0.85P(AUB)=P(A)+P(B) - P(A∩B)=P(A)+P(B) - [ P(B) -P(B∩~A) ]=P(A)+P(B) - [ P(B) -P(~A).P(B|~A) ]=P(A)+P(B) - [ P(B) -( 1-P(A)) .P(B|~A) ]=0.92 +0.3 - [ 0.3 - ( 1-0.92)(0.85) ]=0.988