Twice the sum of a number and seven is three times the number.
can someone me model htis , im stuc at half way and dont know if i will put it right. just what it would be non worded

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.