A school club has members categorized by grade level and primary instrument. The table below shows the number of members in each category.
| Strings | Woodwinds | Total | |
|---|---|---|---|
| 9th Grade | 25 | 15 | 40 |
| 10th Grade | 30 | 20 | 50 |
| Total | 55 | 35 | 90 |
If a member is selected at random from the club, what is the probability that the selected member is in the 10th Grade?
