Complement Set Worksheets

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  • I know about Universal sets.
  • I know about complement of a set.
  • I know about number of subsets.

Check out the following lessons on the complement of a set and universal sets if you need help.
Complement of a Set
Universal Set

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. Given that A = {2, 4, 5, 7, 8, 9} and n(A’) = 7, find n(U).
n(U) =

2. Given n(U) = 15 and B = {x : x is an even number, 5 < x < 20}, find n(B’).
n(B’) =

3. Given that U = {x : x is a whole number and 10 < x < 20}
A = {y : y is a multiple of 3}
B = {z : z is an odd number}
a) n(A’) =

b) n(B) =

c) the number of subsets of A and the number of subsets of A’
number of subsets of A =
number of subsets of A’ =

d) the number of subsets of B and the number of subsets of B’
number of subsets of B =
n(B’) =
number of subsets of B’ =

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