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Permutation and Combinations
New
1 students
Last updated 5/2026
English

What you'll learn

  • Master core Permutations and Combinations concepts, including arrangements, selections, distributions, and counting techniques.
  • Apply combinatorial methods to solve GATE, university, aptitude, Olympiad, and competitive programming problems.
  • Develop advanced problem-solving skills using symmetry, case analysis, grouping, constraints, and recurrence thinking.
  • Solve complex counting problems using techniques such as Inclusion-Exclusion, Stars and Bars, Derangements, and Generating Functions.

Course content

12 sections62 lectures18h 37m total length
  • Strategy For Combinatorics7:16
  • Difference between No Repetition, Unlimited Repetition and Limited Repetition15:34
  • Categories Of Questions7:40
  • Understanding Fundamentals Of Combinatorics29:00
  • Understanding Unlimited Repetition using Example3:26
  • Sum Rule and Product Rule6:07

Requirements

  • No experience needed. You will learn everything from scratch.

Description

Master Permutations & Combinations for GATE, College Mathematics & Competitive Exams

Taught by RBR Sir

Build a strong foundation in Permutations and Combinations (PnC) with this complete course designed for GATE aspirants, college students, competitive exam learners, and anyone interested in mastering combinatorics and mathematical problem solving.

This course is taught by RBR Sir, known for his deep conceptual teaching style and problem-solving approach. The course focuses not just on formulas, but on developing the analytical thinking required to solve advanced combinatorics problems confidently.

Starting from the fundamentals, the course gradually moves toward advanced applications used in:

  • GATE CS & DA

  • university and college mathematics

  • aptitude and placement preparation

  • competitive programming

  • Olympiad-style reasoning

  • advanced problem solving

You will learn how to solve problems using:

  • logical counting techniques

  • symmetry and case analysis

  • grouping methods

  • constraints handling

  • recurrence-based thinking

  • generating functions

  • combinatorial modeling

The course includes:

  • 18+ hours of in-depth lectures

  • 60+ structured video lessons

  • concept-building examples

  • advanced problem-solving sessions

  • PYQs and practice discussions

  • beginner-to-advanced coverage

Topics Covered

  • Fundamentals of Combinatorics

  • Permutations (nPr)

  • Combinations (nCr)

  • Repetition and Constraints

  • Circular Permutations

  • Distribution & Partition Problems

  • Stars and Bars Technique

  • Inclusion-Exclusion Principle

  • Derangements

  • Pigeonhole Principle

  • Binomial Coefficients & Summations

  • Generating Functions

  • Recurrence Relations

  • PYQ & Practice Sessions

Who This Course Is For

  • GATE aspirants

  • College and university students

  • Learners preparing for aptitude and placement tests

  • Competitive programmers

  • Students who want strong combinatorics foundations

  • Anyone interested in advanced mathematical reasoning

Requirements

  • Basic mathematics knowledge

  • Interest in logical and analytical problem solving

  • No prior combinatorics experience required

Why Take This Course?

This course is designed to help students move beyond memorizing formulas and truly understand the logic behind counting and combinatorial reasoning. Every concept is explained step-by-step with detailed examples and multiple problem variations, making it suitable for both beginners and advanced learners.

Who this course is for:

  • Beginner