Algebra-1

Question Analysis
This question focuses on the "12th Grade" row in the table.
The main focus is on determining the marginal frequency for 12th graders, regardless of their class time preference.

Key Concept Explanation
Marginal Frequency (Row): The total number of individuals in a row, calculated by summing the joint frequencies within that row. It represents the total count for one category of the row variable (e.g., all 12th graders, whether they prefer morning or afternoon classes).

Step-by-Step Solution
Locate the row labeled "12th Grade".
The marginal frequency for this row is the "Row Total" at the end of the row, which is 100.
(Verification: Add...