To determine the total number of 8th graders using the two-way table, let's fill in the missing values based on the information we have:
- We know that on Friday, there are 24 7th graders and a total attendance of 52 on that day.
- We can calculate the number of 8th graders attending on Friday: \[ \text{8th graders on Friday} = \text{Total on Friday} - \text{7th graders on Friday} = 52 - 24 = 28 \]
So, the number of 8th graders on Friday is 28.
- On Saturday, we have 35 8th graders, which is given in the table.
Now, we can total the number of 8th graders: \[ \text{Total 8th graders} = \text{8th graders on Friday} + \text{8th graders on Saturday} = 28 + 35 = 63 \]
Thus, the total number of 8th graders is 63.
The correct response is: 63