UPSSSC PET 2026 DI Sample Paper 01 🔥 | Pet Di Class | Data Interpretation | Aditya Ranjan Sir

Summary

Aditya Ranjan Sir leads a timed Data Interpretation practice class, presented as Sample Paper 1 in a planned series of five papers. The class reviews exam-style questions using bar graphs, tables, pie charts, line graphs, and percentage distributions. Students are encouraged to attempt each question before watching the solution, with an emphasis on speed, accuracy, and confidence.

Main Concepts and Methods

Bar Graph: Student Marks

The graph shows the number of students in five score ranges:

Score range Number of students 0–10 4 10–20 6 20–30 10 30–40 8 40–50 5

From the graph, students can directly find that:

• The ratio of students in the first and last ranges is 4:5.
• The range with the fewest students is 0–10.
• The range with the most students is 20–30.
• The total number of students is 33.

Table: Employees by Year and Department

The table gives employee totals and the percentage of women in the engineering, law, and medicine departments across several years.

To find the percentage of male employees, subtract the percentage of women from 100%. For example, if women make up 45%, men make up 55%.

The worked questions demonstrate how to:

• Calculate a ratio using values from different years and departments.
• Find male employee counts before calculating an average.
• Find the difference between a male count in one department and a female count in another.
• Compare department totals by summing the relevant data and subtracting.

Key lesson: First identify the year, department, and gender requested, then calculate the required value. To find an average, add the relevant quantities and divide by the number of quantities.

Pie Chart: Family Expenses and Savings

When comparing two categories, their ratio can be found directly from their angles or percentages. It is usually unnecessary to convert each sector into money first.

For example, food at 120° and savings at 60° give a ratio of 2:1.

If a known amount corresponds to one sector, use the same proportion to find the amount for another. For instance, a 30° sector is half the size of a 60° sector.

Line Graph: Percentage Increase in Exam Marks

The question asks for the highest percentage increase, not simply the largest increase in marks.

Calculate each increase relative to the earlier score:

Percentage increase = increase ÷ previous value × 100

If two periods have the same increase, the period with the smaller starting value has the greater percentage increase. The teacher uses this comparison to identify the relevant period without calculating every percentage in full.

Enrollment and Pass Percentages

Distinguish between the number of students enrolled and the number who passed. To calculate the number who failed, subtract the number who passed from the total enrolled.

In the worked comparison, the teacher calculates totals for the specified institutions and finds their difference: 399.

Quarterly Sales Table

Compare the change from Q1 to Q2 in each region. The increases are tied across North, South, and West, while East has a smaller increase. The key is to compare all regions rather than select the first one that appears to fit.

Other Table and Chart Questions

• Bottles question: Test the statements using the requested sums or averages. Once a statement is shown to be false, there is no need to verify every other statement.
• College-subject distribution: Multiply each college total by its subject percentage to find the relevant subject count. To calculate the average, add the counts for the five colleges and divide by five.
• Digital-sum check: A digital sum can help identify or verify an answer when the options have distinct digit sums, but it does not replace understanding what quantity the question asks for.
• Colour-preference question: Read the green and red values, then subtract them.
• Organization question: Combine organization shares with male/female percentages, calculate the requested average, and compare it with the relevant total to find the unknown percentage. Question 20 is left as homework for students to answer in the comments.

Study Guidance

• Treat the session as active practice: attempt each problem before listening to the explanation.
• Use the timer to build speed and become comfortable working under exam pressure.
• Read each question carefully and identify whether it asks for a total, ratio, difference, average, or percentage increase.
• Avoid unnecessary calculations. Use ratios directly when values are proportional, and use estimation or option checks only when appropriate.
• The teacher recommends attending practice sessions live rather than postponing them, so students complete the problems instead of merely watching the solutions later.

Speakers and Sources

• Speaker: Aditya Ranjan Sir, the instructor.
• Other person mentioned: Anurag Bhaiya, whom the instructor thanks. The subtitles do not include a separate speech from him.
• Referenced exam sources: Questions described as coming from UPSSSC-related exams, including an Excise Constable mains paper and a Stenographer paper.
• Referenced platforms: Vidyagram State Exam YouTube channel, its Telegram group, and the Vidyam application.