Probability
Submitted by maggie on 10. June 2008 - 1:48.
Currently I am in an accelerated Business Statistics course through the University of Wisconsin colleges. I only have four weeks left of class and need some help understanding some things about probability:
We have sample online exams that give the answer but not how the answer was achieved. I am stuck on this question below:
If P(A) = 0.4, P(B| A) = 0.35, P(A U B) =0.69, then P(B) = 0.43
Hi Thanks for your post ,
Hi
Thanks for your post , just remember Bayes Theorem for these type of problems
P(B/A) = P(A ^B) / P(A)
and Second result
P(A U B) = P(A)+ P(B) - P( A ^ B)
Please read ^ as AND Symbol
Just use these two relations to find anything you want.
I hope this helps