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need help with this pre test question. Could you please show all work in detail?

need help with this pre test question. Could you please show all work in detail?

12. You are told that P(A) = 0.334, P(B) = 0.551, the two events are disjoint.  

a. [2] Calculate P(A OR B)  

b. [2] Calculate P(A AND B) = 

13. You are told that P(A) = 0.833, P(B) = 0.452, the two events are independent.

a. [2] Calculate P(A OR B) = 

b. [2] Calculate P(A AND B) = 

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