You are at a restaurant and receive a bill for $65.82 how much will you leave for a tip of you wanted to leave an 18% tip

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.