To determine the total number of 8th graders, we need to fill in the missing values in the two-way table using the information provided.
From the table:
- Total attendance for Friday = 52
- 7th graders attending on Friday = 24
To find the number of 8th graders attending on Friday, we can use the total attendance for that day:
\[ \text{Total attending on Friday} = \text{7th graders on Friday} + \text{8th graders on Friday} \]
This can be expressed mathematically as:
\[ 52 = 24 + \text{(8th graders on Friday)} \]
Calculating the number of 8th graders on Friday gives:
\[ \text{(8th graders on Friday)} = 52 - 24 = 28 \]
Now, adding this to the number of 8th graders attending on Saturday (which is already given as 35), we can find the total number of 8th graders:
\[ \text{Total number of 8th graders} = (\text{8th graders on Friday}) + (\text{8th graders on Saturday}) = 28 + 35 = 63 \]
Therefore, the total number of 8th graders is 63.
The correct response is:
63