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ECAT Mathematics Chapter 23 MCQs With Answers
Question # 1
A = B iff
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All elements of A also the elements of B
A and B should be singleton
A and B have the same number of elements
If both have the same element
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Question # 2
(A∩Bc)c= -------------------------
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Ac∪Bc
Ac∪B
Ac∩B
None of these
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Question # 3
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 # 4
The number of subsets of a set having three elements is
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4
6
8
none of these
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Question # 5
Write down the power set of {9, 11}
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Question # 6
The set R is ______ w.r.t subtraction
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Not a group
A group
No conclusion drawn
Non commutative group
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Question # 7
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Question # 8
If B⊆ A, then complement of B in A is = -----------------------
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A-B
A∩B
B-A
A∪B
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Question # 9
The multiplicative inverse of -1 in the set {1-, 1} is
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1
-1
+-1
0
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Question # 10
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Biconditional
Implication
Antecedent
Hypothesis
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Question # 11
A conjunction of two statement p and q is true only if
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p is true
q is true
Both p and q are true
both p and q are false
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Question # 12
The geometrical representation of a linear function is
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Circle
Parabola
Straight lie
None of these
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Question # 13
G = {e, a, b, c} is an Abelian group with e as identity element. The order of the other elements are
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2, 2, 2
3, 3, 3
2, 2, 4
2, 3, 4
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Question # 14
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A finite set
An infinite set
An empty set
None of these
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Question # 15
(A ∩ B)c =
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A∩ B
(A ∪ B)c
Ac∪Bc
Φ
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Question # 16
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1/x
-x
2x
0.5 x
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Question # 17
The function f{(x, y) | y = ax
2
+ bx + c} is
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One-one function
Constant function
Onto function
Quadratic function
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Question # 18
{0} is a
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Empty set
Singleton set
Zero set
Null Set
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Question # 19
The set {{a,b}} is
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Infinite set
Singleton set
Two points set
None
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Question # 20
If A = {x/x is a positive integer and 4≤x<23}, then A=
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{1,2,3,4,5,6,7}
{4,5,6...........22}
{1,2,3,.........23}
{1,2,3,4,5}
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Question # 21
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