TNPSC Combined Statistical Subordinate Service Syllabus
152 topics across 5 subjects. Every question carries a written explanation.
The Combined Statistical Subordinate Service Examination was TNPSC's own exam for junior statistics posts. Its last run was Notification 27/2022 (Advertisement 631) of 15 September 2022:
| Post | Service | Vacancies | Pay |
|---|---|---|---|
| Assistant Statistical Investigator | TN General Subordinate Service (Economics and Statistics) | 211 | ₹20,600–75,900, Level 10 |
| Computor | TN Public Health Subordinate Service | 5 | ₹19,500–71,900, Level 8 |
| Statistical Compiler | TN Public Health Subordinate Service | 1 | ₹19,500–71,900, Level 8 |
The exam has not been held on its own since. These posts are now recruited through the Combined Technical Services Examination (Non-Interview Posts). The 2026 edition, Notification 04/2026 of 20 May 2026, includes:
| Post | Department | Vacancies |
|---|---|---|
| Block Health Statistician | Family Welfare | 62 |
| Assistant Statistical Investigator | Economics and Statistics | 13 (Level 10) |
| Statistical Assistant | Food Safety and Drug Administration | 1 (Level 13) |
Last checked against the official notification on .
TNPSC Combined Statistical Subordinate Service Details
Exam Pattern
Both the 2022 CSSS and the 2026 CTS route use the same shape:
| Paper | Content | Marks |
|---|---|---|
| I, Part A | Tamil Eligibility Test, SSLC, 100 questions (60 to qualify, not counted) | 150 |
| I, Parts B and C | General Studies (75) and Aptitude (25) | 150 |
| II | Subject paper, 200 questions, degree level | 300 |
Rank is on 450 marks. The minimum is 135 for reserved communities and 180 for Others. In 2022 the subject paper was Statistics or Mathematics; in 2026 Paper I is OMR and Paper II is computer-based, using paper 504, Statistics, Mathematics and Economics, for the investigator and statistician posts.
Syllabus
The code 504 syllabus has ten units of 15 to 25 questions: algebra and differential calculus; integral calculus and differential equations; vector calculus and operations research; descriptive statistics; probability and inference; time series, index numbers and MS-Excel; micro and macro economics; stabilisation policies; and the Indian economy.
Eligibility Criteria
- Assistant Statistical Investigator (2026): a degree in Statistics, Mathematics, Economics, Applied Economics or Business Economics.
- Block Health Statistician: a degree in Statistics, Mathematics or Economics.
- Statistical Assistant: a master's in Mathematics or Statistics, with working knowledge of statistical software.
In 2022 the upper age for Others was 32, with no limit for reserved communities. The 2026 CTS notification keeps 32 for Others on these posts. Tamil knowledge and the bar on Others with five years of government service apply as in every TNPSC exam.
How to Apply
Apply through the TNPSC portal. In 2026 the fee was ₹100, plus ₹100 for each additional subject paper, on top of One Time Registration.
Important Dates
| Cycle | Applications | Exam |
|---|---|---|
| CSSS 27/2022 | 15 September to 14 October 2022 | 29 January 2023 |
| CTS Non-Interview 04/2026 | 27 May to 25 June 2026 | Between 16 August and 19 September 2026 (by subject) |
In the 2026 Annual Planner, the Non-Interview CTS exam was notified in May with the exam from August. Expect a similar slot in 2027.
Official Links
Frequently Asked Questions
Is the TNPSC Combined Statistical Subordinate Service exam still held?
Not separately since 2022. Its posts are now in the Combined Technical Services (Non-Interview Posts) exam.
How many Assistant Statistical Investigator posts were there in 2026?
13, plus 62 Block Health Statistician posts.
Which subject paper do I take?
Paper 504, Statistics, Mathematics and Economics, for Assistant Statistical Investigator and Block Health Statistician.
Is there an interview?
No. These are non-interview posts.
Computer Awareness (21)
- Computer Fundamentals
- MS Excel
- MS Office
- MS Powerpoint
- MS Word
- Computer Internet
- Computer System Architecture
- Computer Operating System
- Important File Extensions
- Important Abbreviations
- Keyboard Shortcuts
- History of Computers
- Computer Hardware and Software
- Input /Output Devices
- Memory Management
- Computer Languages
- Number System
- Logic Gates
- Computer Network
- Database Management System
- Computer Security
English Language (25)
- Synonyms
- Antonyms
- Double Synonyms
- Homonyms
- One Word Substitution
- Reading Comprehension
- Theme Detection
- Deriving Conclusions from Passages
- Sentence Completion
- Passage Completion
- Fill in the Blanks
- Spotting Errors
- Sentence Improvement
- Passage Correction
- Choose the Correct - Incorrect Sentence
- Reconstruction of Sentence
- Sentences Rearrangement
- Reconstruction of Paragraphs
- Rearrangement of Jumbled Parts
- Word Formation
- Idioms and Phrases
- Active-Passive voice
- Direct-Indirect Speech
- Transformation of Sentences
- Spelling Test
General Awareness / General Knowledge (GK) (23)
- Indian Politics
- Indian History
- Indian Economy
- Important Acts of the Parliament of India
- Honours and Awards
- Indian Geography
- Indian Culture
- World Geography
- Famous Places in India
- Famous Personalities
- Books and Authors
- Sports
- Days and Years
- Inventions
- Highest, Longest, Biggest, Largest, Deepest, Smallest of the World
- General Science
- World Currency
- Country Languages
- Technology
- Physics
- Chemistry
- Biology
- Scientific Names of Plants and Animals
Quantitative Aptitude (49)
- Number System
- H.C.F. & L.C.M.
- Decimal Fractions
- Simplification
- Square Roots & Cube Roots
- Average
- Problems on Numbers
- Problems on Ages
- Surds & Indices
- Percentage
- Operations on Numbers
- Profit & Loss
- Ratio & Proportion
- Partnership
- Chain Rule
- Time & Work
- Pipes & Cistern
- Time & Distance
- Problems on Trains
- Boats & Streams
- Alligation or Mixture
- Simple Interest
- Compound Interest
- Logarithms
- Area
- Volume & Surface Areas
- Mensuration
- Races & Games of Skill
- Calendar
- Clocks
- Stocks & Shares
- Permutations & Combinations
- Probability
- True Discount
- Banker’s Discount
- Heights & Distances
- Odd Man Out & Series
- Algebra
- Divisibility Rules & Remainder Theorem
- Factorials & Power Cycles
- Progressions (A.P., G.P., H.P.)
- Work & Wages
- Set Theory / Venn Diagrams
- Geometry (Lines, Angles, Triangles, Polygons)
- Coordinate Geometry
- Data Interpretation
- Trigonometry
- Statistics (Mean, Median, Mode)
- Arithmetic Operations
Reasoning (34)
- Analogy
- Number Series
- Classification
- Series Completion
- Coding-Decoding
- Input Output
- Inequality
- Blood Relation
- Puzzle Test
- Sequential Output Tracing
- Direction Sense Test
- Linear Seating Arrangement
- Circular Seating Arrangement
- Alphabet Test
- Number, Ranking and Time Sequence Test
- Mathematical Operations
- Logical Sequence of Words
- Arithmetical Reasoning
- Inserting The Missing Character
- Data Sufficiency
- Decision Making
- Assertion and Reason
- Situation Reaction Test
- Verification of Truth of the Statement
- Letter and Symbol Series
- Logic
- Statement - Arguments
- Statement - Assumptions
- Statement - Courses of Action
- Syllogisms
- Statement - Conclusions
- Deriving Conclusions From Passages
- Theme Detection
- Question - Statements
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