1. SET THEORY

2. SET is a collection or groups of objects with certain
characteristics.
The object are known as elements.
A set can be represented by :
–Description
Eg : P is a set of colour of the rainbow
– Set notation
Eg : P = { red, orange, yellow, green, blue, indigo,
purple}

3. - Venn Diagram

4. Symbols :
to show an element of a
certain set
n (A) denote the number of
elements in set A
{ } or an empty set

5. n(A)=7

6. Two set, X and Y are equal if all the elements of set X are
elements of set Y and vice versa
Example :
X = { Letters in the word LOVE }
Y = { Letters in the word EVOLVE }
then, X = { L,O,V,E }
Y = { E,V,O,L }
X and Y have the same elements, so X=Y

7. Set A is a subset of B if all the elements of set
A are found in set B
Universal set is a set with all the elements under
discussion
The complement of set P is a set that has all the
elements in the universal set but not in P and
written as P’

8. B 4
6
A
7
1
2
3 8
5
9
10
= {1,2,3,4,5,6,7,8,9,10} B’= {9,10}
A= {1,3,5,7} A’={2,4,6,8,9,10}
B= {1,2,3,4,5,6,7,8}

9. OPERATION ON SET
Intersection on set
Union on set
Eg : A = { a, e }
B = { a, c, d, e }
= { a, b, c, d, e, f }
A B = { a, e }
A B = { a, c, d, e }

10. A B
b
a c
e d
f

11. Example:
A= {1,2,3,4,5,6,7,8,9}
B= {1,3,5,7,9}
C= {2,3,5,7}
A B= {1,3,5,7,9}
B C= {3,5,7}
A C= {2,3,5,7}
A B C= {3,5,7}

12. A
4 6
8 5
B C
1 9
2
7
3
5

13. Prepared by :
NOR RAIHAN MOHAMAD ASIMONI 0918044
NURUL ATIKAH MOHAMED 0918576