I need to solve this exercise and I do not know how to do so.
The only information that I have are:
What is given:
$a,b \in \{0,1\}$
$p(b) = (b+1)/3$
$p(a|b) = (a+b)/(1+2b)$
What is requested:
$p(b| a=0)$ ?
I tried to apply the Bayes formula, however I do not have the $P(a)$. For the conditional probability I do not have the intersection between $a$ and $b$.
Thanks