Double Pie Chart DI for RRB PO 2025, Check How to Solve 5 Questions set in 3 Minutes?

The RRB PO 2025 exam is one of the most competitive banking exams in India, conducted to recruit Probationary Officers (PO). One of the most scoring yet tricky sections in this exam is the Data Interpretation (DI) section in both Prelims and Mains. Among various DI types, such as Bar Graphs, Line Charts, Tables, and Caselets, the Double Pie Chart DI holds special significance for its frequent appearance and the analytical skills it demands. In this article, we are providing a comprehensive guide for the concepts of double pie chart DI, along with the important questions and topper strategy to solve Pie chart DI In 3 minute.

RRB PO Practice Set for Quant and Reasoning(New Pattern)

Here we are providing the IBSP RRB PO Quant and Reasoning practice tests based on the latest pattern. Candidates can click the link below and attempt the questions.

What is a Double Pie Chart in Data Interpretation?

A Double Pie Chart is a graphical representation consisting of two circular charts (pie charts) placed side by side. Each chart represents a whole (100%) divided into sectors (slices) that show numerical proportions. In DI sets, the Double Pie Chart typically presents two different but related data sets.

For example:

• Pie Chart 1: Distribution of total expenditure of a company across various departments.
  
• Pie Chart 2: Distribution of the total income of the company from various sources.
  

Each chart represents a percentage distribution or sometimes the actual numerical value directly. In exams like RRB PO 2025, these charts are used to frame 4–6 questions based on ratios, percentage increase/decrease, difference, average, or simple calculation-based problems.

Double Pie Chart DI Important Questions for RRB PO 2025 Exam

Question 1: If 5% of the number of unsold phones of company A is defective, then find the number of non-defective unsold mobile phone by company A. 

A) 713

B) 817

C) 822

D) 808

E) None of these

Question 2: Find the difference between the number of unsold mobiles by company D and the number of unsold mobiles by company E.

A) 2940

B) 3670

C) 4210

D) 3990

E) None of these

Question 3: The total number of unsold mobiles by companies A, B and C together is what percentage of the total of unsold mobiles by all the five companies together?

A) 29.78%

B) 32.87%

C) 26.16%

D) 21.33%

E) 16.54%

Question 4: Find the difference between the average of the total number of mobiles manufactured by company C, D and E together and the average of the mobiles sold by company B, C and D together.

A) 2960

B) 3240

C) 2870

D) 3140

E) None of these

Question 5: The average time taken to manufacture a mobile by company C is 18 hours. Find the time taken by company C to manufacture 10% of its unsold mobiles.

A) 66.25 days

B) 68 days

C) 64 days

D) 67.5 days

E) None of these

Step-by-Step Strategy to Solve Double Pie Chart DI in 3 Minutes

To solve a set of five double pie chart questions in three minutes, candidates must optimise their approach for speed and accuracy. Here we are providing the toppers’ preparation tips to solve the double pie chart DI in 3 minutes in the article below.

Step 1: Understand the Charts (30–45 Seconds)

• Scan the Charts: Candidates quickly identify what each pie chart represents (e.g., sales of two companies, expenses across categories, or student enrollment by department). Note the total values (e.g., total sales, total students) for each chart, often provided in a note or title.

Tip: Spend no more than 45 seconds analyzing the charts to leave sufficient time for calculations.

Step 2: Prioritise Questions (15 Seconds)

• Read questions quickly: Read questions quickly to identify questions that require simple calculations (e.g., direct percentage or value extraction) and complex calculations (e.g., ratios or percentage differences in charts). 
• Start with easy questions: Start with questions involving single-chart data or straightforward calculations to build speed and ensure accuracy. 
• Mark complex questions: If a question involves multi-step calculations or comparisons across both charts, solve it after addressing simpler questions to optimize time.

Tip: Allocate about 3–5 seconds per question to decide the solving order.

Step 3: Extract and Calculate Efficiently (1.5–2 Minutes)

• Extract Data Accurately: Note the exact percentage or degree for the relevant sectors. Double-check units (e.g., thousands, lakhs) to avoid errors.
• Use Shortcuts:
  • Percentage to Value: If a sector is 20% of a total of 5000, calculate 20/100 × 5000 = 1000.
  • Degree to Percentage: If a sector is 72°, convert to percentage by dividing by 3.6 (72 ÷ 3.6 = 20%).
  • Ratios: For ratios, compare values directly (e.g., 20% of 5000 vs. 30% of 4000 = 1000:1200 = 5:6).
  • Differences: Subtract values after converting to the same unit (e.g., 15% of 6000 – 10% of 4000 = 900 – 400 = 500).

Step 4: Verify and Move On (15–30 Seconds)

• Quick Verification: For critical calculations, perform a quick recheck (e.g., ensure percentages add up to 100% or degrees to 360°).

Tip: Allocate about 5–10 seconds per question for verification to stay within the 3-minute limit.

Step 5: Practice Time Management

• Simulate Exam Conditions: Practice with mock tests to get accustomed to solving DI sets under time pressure. For more practice, you can take our topic-wise tests for Data Interpretation and solve questions in 3 minutes.

By following this strategy, candidates can solve a set of five double pie chart questions in approximately 3 minutes, leaving time for other sections.

Additional Tips to Master Double Pie Chart DI

Practice with Mock Tests: Solve Double Pie Chart DI sets from previous year papers and mock tests regularly so that you can get familiar with common question types (e.g., ratios, differences, percentage conversions). Websites like PracticeMock and Oliveboard offer free topic-wise tests.

Memorize key percentages: Learn common percentage-to-fraction conversions (e.g., 25% = 1/4, 20% = 1/5, 33.33% = 1/3) to speed up calculations.

Use Estimates Wisely: For questions asking “approximately”, round numbers (e.g., 33.33% ≈ 33%) but ensure accuracy for exact answers.

Focus on High-Weightage Topics: Double pie charts often involve percentages, ratios, and averages, which are high-scoring topics in the IBPS RRB PO syllabus.

Join study groups: Join online communities or Telegram groups for real-time solutions and expert tips to improve your preparation.

Analyze mistakes: After solving the mock test, review the wrong answers to identify calculation errors or incorrect interpretations of charts.

Time management practice: Allocate 8-9 minutes for a set of 15 questions during practice to build momentum for the actual exam.

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