what the question states : "Events A and B are such that: p(A) = 5/12 p(A|notB)=7/12 P(A intersection B ) =1/8 " Would I be correct if I assume that Not B refers to A ? , so then i can draw a probability tree.
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Originally Posted by terence what the question states : "Events A and B are such that: p(A) = 5/12 p(A|notB)=7/12 P(A intersection B ) =1/8 " Would I be correct if I assume that Not B refers to A ? , so then i can draw a probability tree. no you cant assume that, not B not always just A, if A union B is the whole space then not B is in A
Most likely "notB" means "event B did not occur" I would also advise you to draw a Venn diagram for this question.
Originally Posted by terence what the question states : "Events A and B are such that: p(A) = 5/12 p(A|notB)=7/12 P(A intersection B ) =1/8 " Would I be correct if I assume that Not B refers to A ? , so then i can draw a probability tree. . Now . Thus
Originally Posted by Plato . Now . Thus The question then asks for : i) P(B) ii) P(A|B) iii) P(B|A) iv) P(A U B) P(B|A) is easy since P(A intersection B) / P(A) = 0.3 Had i known P(B) iv) would have been easy as well. How can P(B) be found.. ? Well I know this: where
Originally Posted by terence The question then asks for : i) P(B) ii) P(A|B) iii) P(B|A) iv) P(A U B) How can P(B) be found.. ? Well I know this: where From the given you can find But which is given. From which you can find . From which you can find .
From the given you can find how can you find this ? the nearest i can get is that
Originally Posted by terence how can you find this ?
Oh how dumb of me -.- I should have reasoned that out. Largest problem with probability=> reasoning simple things out. Thanks @Plato
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