Inclusion–exclusion for two sets (Union size = sum of sizes minus overlap)
jee-mainjee-advanced
Union size = sum of sizes minus overlap
What each symbol means
| Symbol | What it stands for |
|---|---|
| |A| | Cardinality of A |
| |B| | Cardinality of B |
| |A ∩ B| | Cardinality of overlap |
When to use this
A, B finite sets; counts are non-negative integers.