Chapter 2 of 27
Revision Notes
Sets — Revision Notes
WBJEE · Mathematics
Free Sets revision notes for WBJEE Mathematics 2026 — key concepts, formulas, and definitions for quick revision.
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Key concepts, formulas, and definitions from Sets for WBJEE Mathematics preparation.
Key Topics to Revise
1
Basic Concepts and Representations
- A set is a well-defined collection of distinct objects called elements
- Sets are denoted by capital letters (A, B, C) and elements by small letters (a, b, c)
- Two methods of representation: Roster method and Set-builder method
2
Subsets and Power Sets
- A ⊆ B means every element of A is also in B
- Proper subset: A ⊂ B when A ⊆ B and A ≠ B
- Empty set is subset of every set; every set is subset of itself
3
Set Operations - Union and Intersection
- Union (A ∪ B): elements in A or B or both
- Intersection (A ∩ B): elements common to both A and B
- Disjoint sets: A ∩ B = ∅
4
Complement and Difference Operations
- Complement A' = U - A (elements in U but not in A)
- A ∪ A' = U and A ∩ A' = ∅
- De Morgan's Laws: (A ∪ B)' = A' ∩ B' and (A ∩ B)' = A' ∪ B'
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Key Concepts
A set is a wellEmpty Set (∅)If every element of AUnion (A ∪ B)Complement A'
Frequently Asked Questions
What topics are covered in Sets for WBJEE?
Sets is an important chapter in WBJEE Mathematics. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Basic Concepts and Representations, Subsets and Power Sets, Set Operations - Union and Intersection, Complement and Difference Operations.
How important is Sets for WBJEE?
Sets is a frequently tested chapter in WBJEE Mathematics. Questions from this chapter appear regularly in previous year papers. There are 172 practice questions available for this chapter.
How to prepare Sets for WBJEE?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.
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