Question # 1

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(A∪B)∪C= --------------------------

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A∩B(B∪C)

A∪(B∪C)

A∪(B∩C)

None of these

if A = (x/x€ Q˄ 0 < x < 1}, the A is

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Infinite set

Finite set

Set of rational numbers

Set of real numbers

Group of none-singular matrices under multiplication is

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None-Abelian group

Semi group

Abelian group

None of these

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 (Z, +) forms a group

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Forms a group w.r.t addition

Forms a group w.r.t multiplication

Non commutative group w.r.t multiplication

Doesn't form a group

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a-b=ab

ab=a

a+b=ab

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A

B

U

None of these

The set {x +iy / x, y ∈ Q} forms a group under the binary operation of

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Addition

Multiplication

Division

Both addition and multiplication

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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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If B⊆ A, then complement of B in A is = -----------------------

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A-B

A∩B

B-A

A∪B

Which of the following is the subset of all sets

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Φ

{1,2,3}

{Φ}

{0}

Power set of X i.e P(X) _______ under the binary operation of union U

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Forms a group

Does not form a group

Has no identity element

Infinite set although X is infinite

The set which has no proper subset is

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{0}

{}

{∅}

None of these

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 of months in a year beginning with S.

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{September, October, November}

Singleton set

Null set

Empty set

The complement of set A relative to universal set U is the set

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{1, 2, 3} is _____

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an infinite set

A finite set

A singleton set

Universal set

Z is the set of integers (Z.*) is a group with a * b = a +b +1, a,b ∈ G.then inverse of a is

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-a

a +1

-1-a

None of these

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ECAT Mathematics Chapter 23 MCQs With Answers

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