A group of college DJs surveyed students to find out what music to play for their upcoming party. Thirty percent of the students preferred dubstep, 25% liked trance music. 15% of the respondents...

A group of college DJs surveyed students to find out what music to play for their upcoming party. Thirty percent of the students preferred dubstep, 25% liked trance music. 15% of the respondents selected both dubstep and trance. The proportion of students that like only dubstep is?