For discrete random variables X and Y, the joint PMF p_{X,Y}(x,y) = P(X=x, Y=y). Marginals: p_X(x) = Σ_y p_{X,Y}(x,y). Joint PMFs capture the complete probabilistic relationship between variables.
Multiple Discrete Random Variables
View .mdFor discrete random variables X and Y, the joint PMF p_{X,Y}(x,y) = P(X=x, Y=y). Marginals: p_X(x) = Σ_y p_{X,Y}(x,y). Joint PMFs capture the complete probabilistic relationship between variables.