Question # 1

If A∩B=B, then n(A∩B) is equal to

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n(a)

n(a)+n(c)

n(c)

None of these

The set {{a,b}} is

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Infinite set

Singleton set

Two points set

None

If there is one-one correspondence between A and B, then we write.

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A = B

A⊆ B

A⊇ B

A ∼ B

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

If A and B are two sets then any subset R of A x B is called

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relation on A

relation on B

relation from A to B

relation from B to A

P∉ A means

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Pis subset of A

Pis an element of A

P does not belongs to A

A does not element of P

If D = {a} , the P(D) =

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{a}

∅

{∅,{a}}

{∅,a}

The set of first elements of the ordered pairs in a relation is called its

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domain

range

relation

function

The number of subset of {0} is

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1

2

3

None

{x|x∈R∧x≠x} is a

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Infinite set

Null set

Finite set

None of these

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None of these

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

Which of the following is the subset of all sets

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Φ

{1,2,3}

{Φ}

{0}

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A finite set

An infinite set

An empty set

None of these

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-x

Infinite set

{-4, 4}

None of these

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The identity elements with respect to subtraction is

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0

1

-1

Does not exist

The extraction of cube root of a given number is a

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Unary Operation

Binary Operation

Relation

None of these

(A∪B)∪C= --------------------------

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A∩B(B∪C)

A∪(B∪C)

A∪(B∩C)

None of these

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

The multiplicative inverse of x such that x = 0 is

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-x

does not exist

1/x

0

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ECAT Mathematics Chapter 23 MCQs With Answers

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