Question 1068559
Pr[A∪B]=0.82
,  
Pr[A]=0.69
, and  
Pr[B]=0.56
, find  
Pr[A∩B] = P(A)+P(B) - P[A or B]
-----------
= 0.69+0.56-0.82
-----------
= 1.25 - 0.82
-------------
= 0.43
------------
Cheers,
Stan H.
--------------