100 students entered college. 55 of them chose music. 44 of them chose sports. 20 of them chose both. How many of them chose neither music nor sports?
21 students chose neither music nor sports.
20 students chose both subjects, so 35 students chose music only 24 students chose sports only.
Therefore, 20 (both) + 35 (music) + 24 (sports) = 79.
Number of students who neither took music nor sports: 100 – 79 = 21.