math
posted by dan on .
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 )

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(EF) and P(FE) are conditional probabilities.
Review your class notes to find that:
P(EF)=P(E∩F)/P(F)
and
P(FE)=P(F∩E)/P(E)=P(E∩F)/P(E)
From the above equations, you can solve for P(F) and P(E) respectively.