A university recorded whether students took a physics class and whether they took a calculus class. The data are as follows.
| Took calculus | Did not take calculus | Total | |
|---|---|---|---|
| Took physics | 35 | 65 | 100 |
| Did not take physics | 45 | 155 | 200 |
| Total | 80 | 220 | 300 |
If a student who took physics is selected at random, what is the probability that the student also took calculus?
0.15
0.25
0.35
0.45
