Question # 1

If A and B are two sets then intersection of A and B is denoted by

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If #n = (n-5)²+ 5, then find #3 x #4.

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54

12

4

9

If B-A≠φ , then n(B-A) is equal to

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n(a)+n(c)

n(c)-n(a)

n(a)-n(c)

None of these

Φ set is the _______ of all sets

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Subset

Union

Universal

Intersection

If A is a subset of B and B contains at least one element which is not an element of A, then A is said to be

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Improper subset of B

Super set of B

Proper subset of B

None of these

For any set B, BUB' is

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Is set B

Set B'

Universal set

None of these

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n(A)

n(B)

0

1

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}

Under multiplication, solution set of is

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Groupoid

Abelian group

Semi group

All of these

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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A

A'

U

The identity elements with respect to subtraction is

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0

1

-1

Does not exist

The set of real numbers is a subset of

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The set of natural numbers

The set of rational numbers

The set of integers

The set of complex numbers

If P = {x/x = p/q where p,q∈ Z and q≠ 0}, then P is the set of

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Irrational numbers

Even numbers

Rational numbers

Whole numbers

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A

A'

U

A A'

{1, 2, 3, 4,.....} is set of ______

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Natural numbers

Whole numbers

Integers

Rational numbers

If n(X) = 18, n(X∩Y) = 7, n(X∪ Y) = 40 then n(Y) =

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1

12

5

29

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square root function

identity function

linear function

quadratic function

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ECAT Mathematics Chapter 23 MCQs With Answers

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