sets

2. Definition
 Set is a WELL DEFINED collection of objects
Example:

3. Meaning
Bag is a set which consists of well defined
Objects i.e. pencils, erasers, scale,
books etc. These objects are the elements of
this set

4. Examples
Can a beautiful girl or group of beautiful girls be
a set?
The answer is ‘NO’
because beauty is not well defined

5. Examples
Can a group of boys be a collection of Set?
‘YES’ , group of boys is a set because number
of boys in the group are well defined

6. Examples
A smart man …. Is it a Set?
Ans. ………

7. Examples
Group of teachers in school…….is it a
collection of set?
Ans………

8. Examples
Collection of prime numbers?
Ans…….

9. SETS
 Indiviual object in the set is called ELEMENT or a
MEMBER of the set.
 Sets are denoted by capital alphabets , e.g. A, B, C etc.
 Elements of set are denoted by small alphabets , e.g. a,
b, c,etc
 Use curly braces to represent set.
 We could not repeat an element in a set.

10. Types of Sets
Types
of sets
empty
set
Singelton
set
Finite
set
Infinite
set