Question # 1

In a country, 55% of the male population has houses in cities while 30% have houses both in cities and in village. Find the percentage of the population that has house only in villages.

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45

30

25

50

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n(A)

n(B)

0

1

The set of complex numbers forms

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Commutative group w.r.t addition

Commutative group w.r.t multiplication

Commutative group w.r.t division

Non commutative group w.r.t addition

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

A function in which the second elements of the order pairs are distinct is called

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Onto function

One-one function

Identity function

Inverse function

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A

A'

U

None of these

The set of the first elements of the orders pairs forming a relation is called its

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Relation in B

Range

Domain

Relation In A

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The set (Z, +) forms a group

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Forms a group w.r.t. addition

Non commutative group w.r.t. multiplication

Forms a group w.r.t multiplication

Doesn't form a group

The multiplicative inverse of -1 in the set {1-,1} is

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1

-1

±1

0

Does not exist

The set of the first elements of the orders pairs forming a relations is called its

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Relation in B

Range

Domain

Relation in A

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Evert element of A is in B

Every element of B is in A

Every element of A is in B'

Every element of A is in A

If p and q are two statements then their conjunction is denoted by

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The contra positive of p → q is

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q → p

~q→~q

~p→~q

None of these

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A = C

A = B

B = C

None of these

The function whose range consists of just one element is called

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One-One Function

Identity Function

Onto Function

Constant Function

(A∪B)∪C= --------------------------

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A∩B(B∪C)

A∪(B∪C)

A∪(B∩C)

None of these

The set {-1,1} is closed under the binary operation of

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Addition

Multiplication

Subtraction

Division

If A=B, then

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A⊂B and B⊂A

A⊆B and B⊈A

A⊆B and B⊆A

None of these

The set {{a,b}} is

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Infinite set

Singleton set

Two points set

None

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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