To find the total number of students who participated in the survey, we can either add the total number of seventh graders and eighth graders or look at the total given in the table.
From the table data:
- Total Seventh Grade: 263
- Total Eighth Grade: 275
To find the total number of participants, we can add the totals for each grade:
263 + 275 = 538
Thus, the total number of students who participated in the survey is 538.
The correct response is 538.