a group of students were surveyed about their taste in music. They were asked how they like three types of music: rock, country western and jazz. The results are summarized belowNo one dislikes all three. Six like all three. Eleven don't like country western. Sixteen like jazz. 3 like country western and jazz but not rock. 6 don't like rock. 8 like rock and country western. 7 don't like jazz. how many students were surveyed?