Joint probability distribution

Joint probability distribution for a set of random variables gives the probability of every atomic event on those random variables (every sample point).

$P(\text{Cavity},\text{Weather})$ is a $2\times 4$ matrix of values

$$\left(\begin{array}{cccc}0.144& 0.02& 0.016& 0.02\\ 0.576& 0.08& 0.064& 0.08\end{array}\right)$$

Which is interpreted as:

	$W=sunny$	$W=rain$	$W=cloudy$	$W=snow$
$C=true$	$0.144$	$0.02$	$0.016$	$0.02$
$C=false$	$0.576$	$0.08$	$0.064$	$0.08$