Sets

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

• Element

• Set

• Cardinality

• Universal Set

Which of the following is not a well-defined set?

• The set of boys in your class

• The set of even numbers less than 20

• The set of students wearing red dress

• The set of the colors of the rainbow

Which image shows union of two sets?

• 
• 
• 
• 

Given that
R = { factors of  36 }. 
n(R) = 

• 6
• 9
• 12
• 15

Given  S = { m, 4, 7, 9 }  and 
T = { 4, 9, 3, n }. 
If set  S  and set  T  are equal sets,
the   value of  m + n =

• 14
• 12
• 10
• 8

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

• 20

• 21

• 19

• 18

Set D is the set of the distinct letters in the word mathematics. Write the set using the Roster method.

• D = {m, a, t, h, e, m, a, t, i, c, s}

• D = {m, a, t, h}

• D = {m, a, t, h, e, i, c, s}

• D = {m, a, t, h, i, c, s}

Which is the correct set notation for A U B?

• {12, 14, 15, 18, 21}
• {10, 11, 12, 14, 15, 18, 21}
• {10, 11, 13, 16, 17, 19, 20}
• {12, 14, 15}

Which is the correct set notation for A intersection B ?

• {12, 14, 15, 18, 21}

• {10, 11, 12, 14, 15, 18, 21}

• {10, 11, 13, 16, 17, 19, 20}

• {21}

• {2, 4, 5}

• {2, 3, 4, 5, 6}

• {3}

• {6}