Algebra-1

Question Analysis
This question tests the student's ability to calculate the marginal relative frequency, which is the proportion of a single variable category (6th-grade students) in the overall population (total students surveyed).

Key Concept Explanation
Marginal relative frequency is the ratio of the number of a specific category to the total number of the population. It is used to determine the proportion of a single variable within the entire data set.

Step-by-step Solution
1. Identify the number of 6th-grade students: 45
2. Identify the total number of students surveyed: 150
3. Calculate the marginal relative frequency:

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