Analyzing School Enrollment Data Over Years

The question asks us to find the year in which the total number of girls enrolled in three schools (A, B, and C) is the second highest. To answer this, we first need to calculate the total enrollment of girls for each year from 2017 to 2021 by summing up the enrollments in schools A, B, and C for that specific year.

Let's look at the data provided in the table:

Now, let's calculate the total enrollment for each year:

• For the year 2017: Total enrollment = Enrollment in A + Enrollment in B + Enrollment in C
• Total enrollment in 2017 = $\text{200} + \text{150} + \text{100} = \text{450}$
• For the year 2018: Total enrollment = Enrollment in A + Enrollment in B + Enrollment in C
• Total enrollment in 2018 = $\text{150} + \text{225} + \text{250} = \text{625}$
• For the year 2019: Total enrollment = Enrollment in A + Enrollment in B + Enrollment in C
• Total enrollment in 2019 = $\text{275} + \text{150} + \text{199} = \text{624}$
• For the year 2020: Total enrollment = Enrollment in A + Enrollment in B + Enrollment in C
• Total enrollment in 2020 = $\text{250} + \text{300} + \text{200} = \text{750}$
• For the year 2021: Total enrollment = Enrollment in A + Enrollment in B + Enrollment in C
• Total enrollment in 2021 = $\text{300} + \text{250} + \text{275} = \text{825}$

Let's list the total enrollments for each year:

• Total enrollment in 2017: 450
• Total enrollment in 2018: 625
• Total enrollment in 2019: 624
• Total enrollment in 2020: 750
• Total enrollment in 2021: 825

Now, we need to arrange these total enrollments in descending order to find the highest and second highest values:

1. 825 (Year 2021 - Highest)
2. 750 (Year 2020 - Second Highest)
3. 625 (Year 2018)
4. 624 (Year 2019)
5. 450 (Year 2017 - Lowest)

From the ordered list, we can see that the second highest total enrollment is 750, which occurred in the year 2020.

Revision Table: Key Enrollment Data Analysis

Additional Information: Understanding Data Interpretation

Data interpretation questions require careful reading and calculation based on the information provided, usually in tables, charts, or graphs. The key steps often involve:

• Understanding the question's objective.
• Identifying the relevant data points.
• Performing calculations (addition, subtraction, averages, percentages, ratios) as required.
• Comparing results or identifying trends.
• Selecting the correct answer based on the analysis.

In this problem, the core task was calculating sums for each year and then ranking these sums to find the second highest value. Practice with different types of data representation and calculations is crucial for mastering data interpretation skills.