A school has students participating in various clubs. The table below shows the number of students in some clubs and the probability of selecting a student from the Drama Club:
| Club | Number of Students |
|---|---|
| Chess | 50 |
| Debate | 40 |
| Drama | ? |
| Art | 30 |
If a student is selected at random from all club participants, and the probability that the student is in the Drama Club is , what is the total number of students participating in clubs?
100
120
150
180
