Engineering Board Exam Reviewer · Mutually Exclusive and Independent Events · medium
Events A and B are independent, with P(A)=0.4 and P(A B)=0.7. Find P(B).
- 0.5
- 0.3
- 0.7
- 0.75
Answer
A. 0.5
Solution
0.7=0.4+P(B)-0.4P(B) 0.3=0.6P(B) P(B)=0.5.
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