Algebra-1

Question Analysis
This question tests the student's ability to calculate the marginal relative frequency of a single variable category.

Key Concept Explanation
Marginal relative frequency is obtained by dividing a marginal frequency by the total number of the population, reflecting the proportion of a single variable category in the overall population.

Step-by-step Solution
1. Identify the number of 9th-grade students: 48
2. Identify the total number of students: 120
3. Calculate the marginal relative frequency:

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