A Discrete Probability Distribution

A discrete probability distribution:

A) lists all of the possible values of the random variable and their corresponding probabilities
B) is a tool that can be used to incorporate uncertainty into models
C) can be estimated from long-run proportions
D) is the distribution of a single random variable
Suppose that patrons of a restaurant were asked whether they preferred beer or whether they preferred wine.60% said that they preferred beer.70% of the patrons were male.80% of the males preferred beer.