Class XI Mathematics
Chapter 1: Sets
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Syllabus Sections
Key Formulas & Equations
Click Copy to duplicateCardinality of Union
n(A \cup B) = n(A) + n(B) - n(A \cap B)
Relates size of union of two sets to their individual sizes and intersection.
Power Set Size
|P(A)| = 2^n
Size of power set for set with n elements.
Related Formulas from Adjacent Chapters
Cartesian Product Cardinality
n(A \times B) = n(A) \times n(B)
[From Relations and Functions] Number of ordered pairs in Cartesian product.