Review for Quiz Chapter 2

Let U = {1, 2, 4, 5, a, b, c, d, e}. Find the complement of the set.

T = {2, 4, b, d}

• {1, 5, a, c, e}

• {1, 3, 5, a, c, e}

• {1, 5, a, e}

• {1, 2, 4, 5, a, b, c, d, e}

Write true or false for the following statement.

Let A = {3, 5, 7, 9, 11, 13}

B = {3, 5, 9, 11}

C = {5, 9, 13}

13 ∉ C

• True

• False

Find the number of proper subsets of the set.

{x | x is a day of the week}

• 127

• 128

• 64

• 256

Find n(A) for the set.

A = {x | x is a month in the year}

• n(A) = 12

• n(A) = 1

• n(A) = 52

• n(A) = 24

Write the set in set-builder notation.

{9}

• {x | x is the natural number 9}

• {x}

• {x | x is a natural number}

• {x is a constant}