Posted by dan on Friday, May 25, 2012 at 9:42am.
I assume the question was:
If E and F are events with P ( E ∩ F ) = 0.09 and P ( E | F ) = 0.3 , P ( F | E ) = 0.4
Find P (F )
where P(E|F) and P(F|E) are conditional probabilities.
Review your class notes to find that:
P(E|F)=P(E∩F)/P(F)
and
P(F|E)=P(F∩E)/P(E)=P(E∩F)/P(E)
From the above equations, you can solve for P(F) and P(E) respectively.
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