SETS & VENN DIAGRAM
UNION · INTERSECTION · DIFFERENCE
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Venn Diagram
U
A
B
1
2
3
4
5
6
7
8
9
result
1. The Sets
A
= {1, 2, 3, 4, 5}
B
= {4, 5, 6, 7}
U
= {1, 2, 3, 4, 5, 6, 7, 8, 9}
2. Operations
A ∪ B
Union: in A or B
A ∩ B
Intersection: in both
A − B
Difference: only in A
B − A
Difference: only in B
A′
Complement: outside A
3. Remember
n(A ∪ B) = n(A) + n(B) − n(A ∩ B)
7 = 5 + 4 − 2 ✓
MATRIC MATHS · SETS · PUNJAB BOARDS
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