A group of students conducted a survey regarding their favorite types of music. The results were recorded as follows:

• Pop: 12 students
• Rock: 8 students
• Jazz: 5 students
• Classical: 3 students

To find the mean number of students who preferred each type of music, divide the total number of students by the number of music categories. What is the mean number of students who favored a type of music? Please provide your answer in the grid-in format.