I don't fully agree with the given answer. When we say probability model (at least in the context of the problem), in essence is asking for the probability distribution, in which case the probabilities should add up to 1.

card Winnings Probability

Red 0 1/2

Spade 5 1/4

Clubs (except Ace) 10 12/52 or 3/13

Ace of Clubs 30 (10+20) 1/52

Timothy K.

Usually, when you are making a model, the final answer should be a table, graph, or equation that can be used to find any possible outcome of the event. The Answer that Del gives is such an answer.09/18/19