Question:
Given the sets A = {1, 3, 5}, B = {2, 4, 6} and C = {0, 2, 4, 6, 8}. Then the universal set of all the three sets A, B and C can be____________.
Solution:
A = {1, 3, 5}
B = {2, 4, 6}
C = {0, 2, 4, 6, 8}
Then universal let ∪ for A, B and C is such that
$A \subseteq U$
$B \subseteq U$
and $C \subseteq U$
i.e $U=\{0,1,2,3,4,5,6,8\}$