The pie chart below shows the percentage distribution of total students (Science + Commerce) in 12th class across five different zones. The table provides the number of students in the Science stream for each zone.

| Zone | Students in Science |
|---------------|---------------------|
| Northern Zone | 400 |
| Eastern Zone | 310 |
| Southern Zone | 430 |
| Central Zone | 600 |
| Western Zone | 750 |

Total students (Science + Commerce) across all zones = 4000.

Percentage distribution of total students by zone:

![Screenshot 2025-08-23 23.06.37.png](https://res.cloudinary.com/aptidude/image/upload/v1755970695/aptidude_questions/tvdttqrl6pysasq272px.png)

**Question:**

The number of Commerce students in the Northern Zone is what percent more or less than the total number of students in the Southern Zone?

Question

The pie chart below shows the percentage distribution of total students (Science + Commerce) in 12th class across five different zones. The table provides the number of students in the Science stream for each zone.

| Zone          | Students in Science |
|---------------|---------------------|
| Northern Zone | 400                 |
| Eastern Zone  | 310                 |
| Southern Zone | 430                 |
| Central Zone  | 600                 |
| Western Zone  | 750                 |

Total students (Science + Commerce) across all zones = 4000.

Percentage distribution of total students by zone:

![Screenshot 2025-08-23 23.06.37.png](https://res.cloudinary.com/aptidude/image/upload/v1755970695/aptidude_questions/tvdttqrl6pysasq272px.png)

**Question:**

The number of Commerce students in the Northern Zone is what percent more or less than the total number of students in the Southern Zone?

Accepted Answer

**Solution:**

1. Calculate the total number of students in the Northern Zone:
   - Northern Zone has 25\% of total students.
   - Total students in Northern Zone = $4000 	imes \frac{25}{100} = 1000$.

2. Number of Commerce students in Northern Zone:
   - Commerce students = Total students in Northern Zone - Science students
   - Commerce students = $1000 - 400 = 600$.

3. Calculate total students in Southern Zone:
   - Southern Zone has 15\% of total students.
   - Total students in Southern Zone = $4000 	imes \frac{15}{100} = 600$.

4. Find the percentage difference between Commerce students in Northern Zone and total students in Southern Zone:
   $$	ext{Percentage difference} = \frac{600 - 600}{600} 	imes 100 = 0\%$$

**Answer:** $0\%$

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