To find the total number of students who participated in the survey, you can add the total number of seventh graders and eighth graders together, which is given in the table.
According to the table:
- Total for Seventh Grade: 263
- Total for Eighth Grade: 275
Now, add these two totals together:
263 + 275 = 538
So, the total number of students who participated in the survey is 538.