How to solve a probabilitiy when it has or in the problem. Like P (A or B)?

How to solve a probabilitiy when it has or in the problem. Like P (A or B)?

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Just add the probaility if they are disjoint however take out P(A and B) if the sets are not disjoint.

E.) was P (A and B) and then F.) is P (A or B). Earlier in the question I did P(A)=230/580 and P(B)=200/580. What should I do to find P (A or B)

P(A or B) =1-P'(AorB) =1- 150/580=430/580

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