Sets and Subsets

How many subsets does A={x,y} have?

• 1

• 2

• 3

• 4

A={1,2,3,4}

B={2,3,4,5}

C={2,3,4}

D={5}

Select all that are true

• A

• B

• C

• D

List the element of A.

A = {x : x is a positive odd number smaller than 10}

Answer:
A = { _ , _, _, _, _ }

What is the cardinality of the set

A = {whole numbers less than or equal to 20}?

• 20

• 21

• 19

• 18

Determine whether the following is a well-defined set or not.

The set of composite numbers greater than 30.

• Well-defined

• Not well-defined

What type of set is denoted as either { } or ∅?

• Universal Set
• Empty (or Null) Set
• Disjointed Set
• Complement of a Set

It is a set that all the elements can be listed and can be counted up to the last element.

• INFINITE SET

• FINITE SET

Refers to the number of elements of the set.

• UNIT SET

• CARDINALITY OF SET

• NULL SET

• SUBSET

THERE IS NO ELEMENTS.

• finite set

• null sets

• infinite set