Intro to Sets

Which of the following is a well- defined set?

• Cities in Metro Manila

• beautiful ladies

• delicious food

• intelligent students

What is the cardinality of set M= { f, o, r, g, i, v, e }?

• n(M) = 5

• n(M) = 6

• n(M) = 7

• n(M) = 8

Which of the following in an empty set?

• A= { natural number between 7 and 9}

• B= { counting number less than one}

• C= {prime number less than 10}

• D= { whole number greater than 5}

What is the cardinality of the set containing the letters of the word MATHEMATICS?

• 8

• 9

• 10

• 11

If set A = { 1,3, 5, 7, 9} and set B= {2,3,4,5}, what is A - B?

• {3,5}

• {2, 4}

• { {1, 7,9}

• { 1,2,3,4,5,7,9}

Which of the following are subsets of set D= { f, o, r, g, i, v, e }?

• { o, r, g }

• { f, i, r, e}

• { g, r, a, v, e}

• {g, i, v, e, r}

Which of the following are proper subsets of set E= { c,a,r,e}?

• {c,a,r}

• { a,r,e}

• { }

• {c,a,r,e}

If A= { m, a, r, c, h} and B= { c, h, a, r, m },what is A intersection B ?

• { }

• {a,r,c }

• {h, a,r, m}

• {m, a, r, c, h }

If P = { 1, 2, 3, 4 }, what is the cardinality of its power set?

• 8

• 12

• 16

• 18

Which of the following are well defined sets?

• Primary colors

• President of the Phil.

• kind students in your class

• Days of the week