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Challenge Yourself #CHAPTER1

If set A = {1, 3, 5, 7}, set B = {1, 4, 7}, find the value of A − B.
{1, 3, 5}
{3, 5, 7}
{3, 5}
{4}
If the Cartesian product of two sets A and B(A × B) = {(3, 2), (3, 4), (5, 2), (5, 4)}, find set A.
{3, 2}
{3, 4}
{3, 5}
{3, 3}
A ∪ (B ∩ C) = ____________.
A ∩ (B ∪ C)
A ∪ (B ∪ C)
(A ∪ B) ∩ (A ∪ C)
(A ∪ B) ∪ (A ∪ C)
For any set A, (A')' is equal to:
A
A'
ϕ
None of these
If A = {2, 3, 4} and B = {3, 5} then A ∪ B will be:
{3, 5}
ϕ
{2, 3, 4, 5}
{2, 3}
Let A = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}. Then the number of subsets of A containing exactly two elements is
20
40
45
90
If A is a subset of B and B is a subset of C, then the cardinality of A ∪ B ∪ C is equal to:
Cardinality of C.
Cardinality of B.
Cardinality of A.
If A = {x, y, z}, then the number of subsets in powerset of A is
6
8
7
9
If A = {1, 2, 5, 7} and B = {2, 4, 6} then find the number of proper subsets of A U B ?
127
64
63
31
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