Here are the results of the after-school activity survey at No. 3 Middle School. 200 students took part in the survey, and fifteen percent of them do exercise after school. According to the survey, __________ students use the Internet to learn.
Item | Doing homework | Having lessons online | Watching TV | Reading online |
Number | 25% | 10% | 40 | ? |
- A、60
- B、30
- C、80