To find the total number of students who participated in the survey, we can use the data provided in the table.
- We know that the total number of Seventh Grade students is 263.
- The total number of Eighth Grade students is 275.
To calculate the total number of students surveyed, we can add the total number of Seventh Grade and Eighth Grade students:
\[ \text{Total Students} = \text{Total Seventh Grade} + \text{Total Eighth Grade} = 263 + 275 = 538 \]
Therefore, the total number of students who participated in the survey is 538.