Page 18 - 091math-wb-w3-(sets)

WORKBOOK

Example 3: A   ,2,1  6 , 5 , 4 , 3 and B   :x x is a prime number x ,  10  are given. Represent
A  B by Venn diagram and write in listed form.

INTERSECTION OF SETS:

…………………………………………………………………………………………………………………………………………………………

……………………………………………………………………………………………………………………………………………………..

Symbolically: A ∩ B = { x⃓ x ∈ A and x ∈ B}
By Venn Diagram:

A∩ B   F E E  F .....

Example 4: The universal set U is defined as the set of positive integers less than 10. The subsets A

and B are defined as:
A = {integers that are multiples of 3}
B = {integers that are factors of 30}

(a) List the elements of

(i) A

(ii) B

(b) Place the elements of A and B in the appropriate region in the Venn diagram below.

U

A B

(c) Write A  B and A  B by listed method.

18 091math-wb-w3-(sets)