What is the question paper code?

The question paper code is DFSE-F-STT.

What is the primary language for answering the questions?

Answers must be written in English only.

How are the questions divided in the paper?

There are fourteen questions divided under seven Sections. Candidates have to choose any TWO Sections and attempt the questions therein.

Do all sections carry equal marks?

Yes, all the Sections carry equal marks.

What is the subject of this paper?

The subject of this paper is Statistics.

What are the main topics covered in Section A?

Section A covers Operations Research and Reliability.

IES ISS 2020 Statistics Paper IV Question Paper PDF | UPSC

Central Government Jobs Other Jobs 2020

Year 2020
Conducted By UPSC
Maximum Marks 200
Duration Three Hours
Languages English

Exam Details

Detail	Information
Examination	Indian Economic Service - Indian Statistical Service Examination
Year	2020
Conducting Body	UPSC
Paper	Statistics Paper-IV
Subject	Statistics
Duration	Three Hours
Maximum Marks	200
Question Type	Mixed

This document contains the question paper for the Indian Economic Service - Indian Statistical Service Examination 2020, specifically Statistics Paper IV. Conducted by UPSC, this paper carries a maximum of 200 marks and allows three hours for completion. It is designed for candidates aspiring to join prestigious services through competitive examination. The paper includes a mix of objective and descriptive questions covering Operations Research and Reliability, among other statistical topics. Aspirants can use this paper to understand the exam pattern, difficulty level, and key areas of focus for their preparation. Reviewing previous years' papers like this one is crucial for effective exam strategy. This previous year Indian Economic Service - Indian Statistical Service Examination question paper (2020) is useful for Other Jobs aspirants preparing for Central government recruitment. The paper was conducted by UPSC and reflects the official exam pattern, marking scheme and difficulty level seen in recent cycles. Use it for timed practice, topic-wise revision and understanding how questions are framed in the real examination. Download the free PDF on QuizCurrent to read instructions, attempt MCQs and compare your answers with the study notes provided on this page. Key syllabus areas include Operations Research, Reliability, Dynamic Programming, Optimization, Game Theory, Queueing Theory, Simplex Procedure, Bellman's Optimality Criteria. Useful for Indian Economic Service - Indian Statist preparation. Helps understand the latest exam pattern. Useful for practice and self-assessment.

Major Topics Covered

Operations Research
Reliability
Dynamic Programming
Optimization
Game Theory
Queueing Theory
Simplex Procedure
Bellman's Optimality Criteria

Why This Paper is Important

Useful for Indian Economic Service - Indian Statist preparation
Helps understand the latest exam pattern
Useful for practice and self-assessment
Covers frequently asked General Studies topics
Helpful for analysing question trends

Related Resources

IES ISS 2021 Statistics Paper IV
IES ISS 2019 Statistics Paper IV
IES ISS 2020 Statistics Paper III
IES ISS 2020 General English Paper
IES ISS 2020 Statistics Paper IV Answer Key
UPSC Statistics Paper Answer Key
IES ISS Syllabus
UPSC Statistics Syllabus

Instructions

There are FOURTEEN questions divided under SEVEN Sections.
Candidate has to choose any TWO Sections and attempt the questions therein.
The number of marks carried by a question/part is indicated against it.
Wherever any assumptions are made for answering a question, they must be clearly indicated.
Diagrams/Figures, wherever required, shall be drawn in the space provided for answering the question itself.
Unless otherwise mentioned, symbols and notations have their usual standard meanings.
Attempts of questions shall be counted in sequential order.
Unless struck off, attempt of a question shall be counted even if attempted partly.
Any page or portion of the page left blank in the Question-cum-Answer (QCA) Booklet must be clearly struck off.
Answers must be written in ENGLISH only.

Questions (page 2)

Section A

Q1.

(a) subject to 3x₁ + 4x₂ ≤ 6 x₁ + 3x₂ ≥ 2 x₁, x₂ ≥ 0 using Simplex procedure.

(i) Describe dynamic programming problem and discuss its applications.

(b) (ii) State Bellman's optimality criteria. (iii) Minimize Z = y₁² + y₂² + y₃² subject to y₁ + y₂ + y₃ ≥ 18 y₁, y₂, y₃ ≥ 0 For two players A and B, the payoff matrix is given below :

(d) on one patient and service times follow exponential distribution. Patients arrive according to Poisson process with mean 6/hour and queue discipline followed is FIFO (FCFS). Calculate the following:

(i) Expected number of patients in the queue (ii) Expected amount of time spent by a patient in the clinic (iii) Percentage of idle time of any dentist (iv) Probability that all dentists are busy 10 2 DFSE-F-STT/6

Question paper preview

Scanned pages 1–2 for reference. Download the official PDF for the full paper.

UPSC IES ISS 2020 Statistics Paper IV question paper page 1 scan, showing exam header and specific instructions for candidates. PDF download available. — Page 1

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Frequently asked questions

What is the name of the examination?

The examination is the Indian Economic Service - Indian Statistical Service Examination.

Which paper is this question paper for?

This is Statistics Paper-IV.

What is the conducting body for this examination?

The examination is conducted by UPSC (Union Public Service Commission).

In which year was this examination held?

This examination was held in the year 2020.

What is the maximum marks for this paper?

The maximum marks for this paper are 200.

What is the time duration allowed for this paper?

The time allowed for this paper is Three Hours.

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