SOLUTION: If A and B are disjoint with Pr[A]=0.63 and Pr[B]=0.04 , find Pr[A∪B] i'm not sure how to begin , can you please guide me ?

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Question 1020257: If A and B are disjoint with Pr[A]=0.63 and Pr[B]=0.04 , find Pr[A∪B]
i'm not sure how to begin , can you please guide me ?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
P[A∪B]=P[A]+P[B]-P[A∩B]
If the sets are disjoint,P[A∩B]=0