Probability of Preferring Pop or Classical Music

A student conducted a survey of 30 classmates to find out their favorite types of music. The students could choose from four genres: Pop, Rock, Classical, and Jazz. After the survey concluded, the results were as follows:

• Pop: 12
• Rock: 7
• Classical: 8
• Jazz: 3

Based on these results, what is the probability that a randomly selected student from this group prefers either Pop or Classical music? Express your answer as a simplified fraction.