To determine which vegetable was chosen by the greatest number of students, we need to express all the choices in decimal form:
- Green beans: 0.35
- Broccoli: 0.20
- Peas: Not specified, but let's identify it as \( P \).
- Corn: 20% = 0.20
Now we compare the percentages:
- Green beans: 0.35
- Broccoli: 0.20
- Peas: \( P \) (not specified)
- Corn: 0.20
Since we don't have the value for peas, we cannot make a complete comparison. However, we can compare the given values:
- The highest currently known value is for green beans (0.35).
- Both broccoli and corn are at 0.20.
Based on the information provided, without the value for peas, the vegetable chosen by the greatest number of students would be green beans.
So, the answer is: 1.