HEY CAN SOMEONE HELP ME FAST I GIBE BRAINLIST

Pls! does anybody know a shortcut for answering these types of questions in the future?

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.

Can someone tell me if these are correct?