Algebra-1

Question Analysis
This question tests the student's ability to calculate the joint relative frequency from a given two-way frequency table. The joint relative frequency is the ratio of the number of 11th-grade students who play basketball to the total number of students.

Key Concept Explanation
Joint Relative Frequency: It is the ratio of the number of students in a specific subcategory (e.g., 11th-grade students who play basketball) to the total number of students in the population.

Step-by-step Solution
1. Identify the number of 11th-grade students who play basketball: 70
2. Identify the total number of students: 150
3. Calculate the joint relative frequency:
4. Simplify the fraction if necessary:

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