South Central High School is holding a fundraiser in which they are selling slices of pepperoni pizza at lunch. In addition to the pizza, they have received a one-time donation from the school's PTA. The total revenue from the fundraiser, r, after s slices of pizza are sold is shown in the table below.

Mahnoor randomly selects times to walk into a local restaurant and observe the type of music being played she found that the restaurant was playing country 11 times rock & roll 17 times and blues 8 times use the observed frequencies to create a probability model for the type of music the restaurant is playing the next time mahnoor walks in.