STATS FOR DS

Conditional Probability

Tree Diagram

P(A and B) =P(A)*P(B) =P(A)*P(B|A) =3/7*4/6 =12/42 ≈0.2.

P(A∩B)/P(A) = P(B|A)*P(A)/ P(A)
P(B|A) = P(A∩B)/P(A) or P(A|B) = P(A∩B)/ P(B)
P(A∩B) = P(B|A)*P(A) = P(A|B)*P(B)
P(A|B) = P(B|A)*P(A) / P(B) ... Bayes Theorem

--

--

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store