SETS

Which of the following is a well-defined set?

• A set of beautiful sceneries

• A set of good basketball players

• A set of Philippine Presidents

• A set of successful leaders.

List all the distinct letters in the word “school”.

• {s, c, h, o, o, l}

• {s, c, h, o, l}

• {s, h, o, o, l}

• {s, c, o, l}

Which of the following is the symbol of an empty set?

• $\cap$

• $\cup$

• $\subseteq$

• { }

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

Which symbol is used to indicate the intersection of two sets?

• $\cup$

• $\cap$

• $\not\subset$

• { }

Which symbol is used to indicate the union of two sets?

• $\cup$

• $\cap$

• $\not\subset$

• { }

Given the following :

A = {1, 2, 4, 5, 6}

B = {1, 3, 5, 7},

C = {2, 4, 6, 8}

Find A U B.

• {1, 2, 3, 4, 5, 6, 7}

• {1, 2, 3, 4, 5, 7, 8}

• {3}

• {1, 3, 4, 5, 7, 8}

Given the following :

A = {1, 2, 4, 5, 6}

B = {1, 3, 5, 7},

C = {2, 4, 6, 8}

Find B ∩ C

• {0, 2, 3}

• {1, 2, 3, 4, 5, 7, 8}

• { }

• {8}

Given the following :

A = {1, 2, 4, 5, 6}

B = {1, 3, 5, 7},

C = {2, 4, 6, 8}

Find A – B.

• {1,2,4}

• {5,7,8}

• {3}

• {2, 4, 6}