Counting and Cardinality

Equivalent sets have

• the same number of elements

• the exact same elements

• the opposite elements

• nothing

Equal sets have

• the same number of elements

• the exact same elements

• the opposite elements

• nothing

What is the cardinality of the set A = {whole numbers less than or equal to 20}?

• 20

• 21

• 19

• 18

It is a collection of well-defined group of objects.

• Element

• Set

• Cardinality

• Universal Set

What is the cardinality of set A which contains all counting numbers less than 10?

• 7

• 8

• 9

• 10

It is a collection of well-defined group of objects or events.

• Element

• Set

• Cardinality

• Numbers

Which of the following is a subset of A= {1,2,3}?

• {0}

• {0,1}

• {1,2}

• {2,3,4}

Given the set of letters in the word “mathematics”, what is the cardinality of the given set?

• 11

• 8

• 6

• 4

Given A = {i, c, e} and B = {c, o, l, d}, find A ∪ B.

• {c, o, l, d, i, e}

• {i, e}

• {e}

• { }

Given E = {pig, goat, cow, horse} and F = {chicken, duck}, find E – F.

• {pig, goat, cow, horse, chicken, duck}

• {pig, goat, cow, horse}

• {chicken, duck}

• { }