Which of the following is a null set ?
{0}
{x:x>0 or x
{x:x2 = 4 or x=3}
{x: x2 + 1 = 0, x∈R}
Let n(∪) = 700, n(A) = 200, n(B) = 300 and n(A∩B) = 100 then n(A'∩B' )
400
600
300
200
If A = [x:x is a multiple of 3] and B = [x:x is a multiple of 5], then A - B is
A'∩B
A∩B'
A'∩B'
(A∩B)'
If the sets A and B are defined as A = {(x,y): y = ex , x∈R} B = { (x,y): y = x, x∈R} then
B⊆A
A⊆B
A∩B = ∅
A∪B = A
B - A is defined as
{x/x∈A, x∉B}
{x/x∈B, x∉A}
{x/x∉A, x∉B}
{x/x∈B, x∈A and B}
The number of proper subsets of the set {1,2,3} is -----------
8
7
6
5
If A∩B = B then
A ⊂ B
B ⊂ A
A = ∅
B = ∅
Let A and B be subsets of a set X. Then
A - B = A∪B
A - B = A∩B
A - B = Ac ∩ B
A - B = A∩Bc
The number of non - empty subsets of the set {1,2,3,4} is
15
14
16
17
If A and B are any two sets, then A∩ (A∪B) is equal to
A
B
Ac
Bc
