Algebra-1

Question Analysis
This question tests the student's ability to find the first quartile (Q1) of a given data set. Q1 is the median of the first half of the data set.

Key Concept Explanation
The first quartile (Q1) is the value below which 25% of the data falls. It is the median of the first half of the data set.

Step-by-step Solution
1. The data set is already sorted: 15, 20, 25, 30, 35, 40, 45, 50, 55, 60.
2. Identif...