If U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} and A = {1, 3, 5, 7, 9}, then A' is:
Anonymous Quiz
20%
{1, 3, 5, 7, 9}
70%
{2, 4, 6, 8, 10}
6%
U
3%
Φ
❤4
Which of the following is the correct representation for (A U B)'?
Anonymous Quiz
38%
A' U B'
45%
A' ∩ B'
11%
A ∩ B'
6%
A' U B
❤4
If A and B are two sets such that n(A) = 70, n(B) = 60 and n(A U B) = 110, then n(A ∩ B) is equal to:
Anonymous Quiz
27%
240
57%
20
13%
40
3%
50
Let S be the set of all straight lines in a plane. The relation R defined on S by 'l R m if l is perpendicular to m' is:
Anonymous Quiz
18%
Reflexive
45%
Symmetric
23%
Transitive
15%
An equivalence relation
❤2
❤3
In a group of 50 people, 35 speak Hindi, 25 speak both English and Hindi and all the people speak at least one of the two languages. How many people speak only English?
Anonymous Quiz
26%
10
48%
15
13%
20
14%
25
❤3
The set builder form of the set {3, 6, 9, 12} is:
Anonymous Quiz
50%
{x: x = 3n, n ∈ N and 1 ≤ n ≤ 4}
30%
{x: x is a multiple of 3}
15%
{x: x = 3n, n ∈ W and 1 ≤ n ≤ 4}
5%
{x: x is a prime multiple of 3}
❤2
For any two sets A and B, A - B is equal to:
Anonymous Quiz
40%
A ∩ B'
27%
A' ∩ B
19%
A ∩ B
13%
A U B'
❤3🥰1
If A = {1, 2}, the power set of A is:
Anonymous Quiz
49%
{Φ, {1}, {2}, {1, 2}}
25%
{{1}, {2}}
7%
{Φ, {1, 2}}
19%
{{Φ}, {1}, {2}, {1, 2}}
❤5
If A and B are disjoint sets, then n(A U B) is equal to:
Anonymous Quiz
47%
n(A) + n(B)
33%
n(A) + n(B) - n(A ∩ B)
12%
n(A) * n(B)
8%
0
❤3
Which of the following collections is not a set?
Anonymous Quiz
27%
The collection of all the boys in your class.
18%
The collection of all natural numbers less than 100.
51%
The collection of ten most talented writers of India.
5%
The collection of all even integers.
❤2
If A, B, C are any three sets, then A × (B U C) is equal to:
Anonymous Quiz
47%
(A × B) U (A × C)
28%
(A U B) × (A U C)
18%
(A × B) ∩ (A × C)
7%
None of these
❤2👍1
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❤6
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If A = {1, 2} and B = {3, 4}, then the number of relations from A to B is:
Anonymous Quiz
51%
4
17%
8
28%
16
4%
6
❤3
Let R be a relation on the set N of natural numbers defined by nRm if n divides m. Then R is:
Anonymous Quiz
27%
Reflexive and symmetric
28%
Transitive and symmetric
38%
Reflexive, transitive but not symmetric
7%
Equivalence relation
The domain of the function f(x) = √(9 - x²) is:
Anonymous Quiz
46%
[-3, 3]
29%
(-∞, -3]
20%
[3, ∞)
4%
(-∞, ∞)
❤1
❤2
Let R be a relation from a set A to a set B. Then:
Anonymous Quiz
36%
R = A U B
23%
R = A ∩ B
38%
R ⊆ A × B
3%
R ⊆ B × A
❤2