There are 400 students. 120 students take dance as their elective. 200 students take art as their elective. The rest take music. What percentage of students take music? Give me reasons, before answering the question
There are 400 - 120 - 200 = 80 students in music. Thus, students in music make up (80 / 400) * 100 = 20% of the students. So the final answer is 20.