Probability of Preferring Neither Sports nor Music

In a recent study, a group of students from three different schools, A, B, and C, were surveyed regarding their preferences for different types of extracurricular activities. The results of the survey are summarized in the table below:

If you were to randomly select a student from these three schools, what is the probability that the student prefers neither sports nor music? Provide your answer as a fraction in simplified form.