Dear all,(adsbygoogle = window.adsbygoogle || []).push({});

P (A |B) + P (A c|B) = 1 [A c] denotes complement of set A and of course P (B)>0

Is the above statement true?

How about the following two:

P (A |B) + P (A |B c) = 1

P (C ∪ D|B) = P (C |B) + P (D|B) − P (C ∩ D|B)

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Conditional Probability (confusing)

**Physics Forums | Science Articles, Homework Help, Discussion**