Identify the symbol for a joint probability distribution Cho

Identify the symbol for a joint probability distribution. Choose the correct answer below.

Solution

Solution:

Joint probability distribution is given by

p(x,y)

Two Discrete Random Variables Definition I Let X and Y be two discrete rvs defined on the sample space S of an experiment. The joint probability mass function p(x, y) is defined for each pair of numbers (x, y) by p(x, y) = P(X = x and Y = y)

It must be the case that p(x, y) 0 and P x P y p(x, y) = 1.