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ECAT Mathematics Chapter 23 MCQs With Answers
Question # 1
Given X.Y are any two sets such that number of elements in X = 18, number of elements in set Y = 24,and number of elements in set X∪ Y =40,then number of elements in set x∩ Y =
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3
1
2
4
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Question # 2
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Question # 3
(A ∩ B)c =
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A∩ B
(A ∪ B)c
Ac∪Bc
Φ
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Question # 4
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Question # 5
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Question # 6
If a = {2m/2m < 9 ,m€ p} , the (n A) =
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{2,3,4,5,6,7,8}
{2,4,6,8............16}
{ 4, 6}
{2,3,5,7}
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Question # 7
The identity element of a set X with respect to intersection in P(x) is
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X
Does not exist
∅
None of these
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Question # 8
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A
A'
U
None of these
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Question # 9
What is the number of elements of the power set of {0, 1}
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1
2
3
4
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Question # 10
Let A and B be two sets. If every element of A is also an element of B then
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Question # 11
The set of whole numbers is subset of
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The set on integers
The set of natural numbers
{1, 3, 5, 7, ....}
The set of prime numbers
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Question # 12
Which of the following sets in infinite
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The set of students of your class
The set of all schools in Pakistan
The set of natural numbers between 3 and 10
The set of rational numbers between 3 and 10
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Question # 13
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A
A'
U
None of these
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Question # 14
For any set X, X∪X is
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X
X'
Φ
Universal Set
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Question # 15
The contra positive of p → q is
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q → p
~q→~q
~p→~q
None of these
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Question # 16
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Question # 17
If B ={x/x€ Z ^ - 3 < x < 6}, then n (B) =
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5
{-3,-2,-1,0,1,2,3,4,5,6}
8
9
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Question # 18
The set of integer is
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Finite group
A group w.r.t addition
A group w.r.t multiplication
Not a group
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Question # 19
The set of the first elements of the ordered pairs forming a relation is called its
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Function on B
Range
Domain
A into B
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Question # 20
The complement of set A relative to universal set U is the set
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Question # 21
The set of all positive even integers is
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Not a group
A group w.r.t. subtraction
A group w.r.t. division
A group w.r.t. multiplication
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