Subsets with Non-Empty Intersection (Jee Mains) | ExamDuo
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Sets & Relations
Medium
Subsets with Non-Empty Intersection
Let
A
=
{
1
,
2
,
3
,
4
,
5
,
6
,
7
}
and
B
=
{
3
,
6
,
7
,
9
}
. Then the number of elements in the set
{
C
⊆
A
:
C
∩
B
≠
φ
}
is _______.
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