Sasi Math (Revised for 1024)

Scroll:Theory of sets >> multiple Choice Questions: >> mcq (4165)

Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.

Which one of the following is a finite set

1) { x : x € W, x ≥ 5}
2) {x : x is an even prime number}
3) 10} ' title="{x : x € N, x > 10} "/> {x : x € N, x > 10}
4) {x : x € Z, x < 5 }

( )

The number of elements of the set { x ; x € Z, x² = 1 } is

1) 3
2) 1
3) 2
4) 0

( )

If A = { 5,{5,6} 7,} Which of the following is correct

1) {6} € A
2) {7} € A
3) {5,6} € A
4) {5} € A

( )

If n(X) = m, n(Y) =n and n(X∩Y) = p then n(XUY) =

1) m-p
2) m+n+p
3) m-n+p
4) m+n-p

( )

If A = { 3,4,5,6} and B = { 1,2,5,6}, then AUB =

1) {1,2,5,6}
2) { 1,2,3,4,6}
3) {1,2,3,4,5,6}
4) {3,4,5,6}

( )

If X = {a{ b, c }d}, Which of the following is subset of X

1) {a,d}
2) {b,c}
3) {c,d}
4) {a,b}

( )

If U = {1,2,3,4,5,6,7,8, 9,10} and A= {2,5,6,9,10} A' is

1) {1,3,4,7,8}
2) ɸ
3) {1,3,5,10}
4) {2,5,6,9,10}

( )

If A is a proper subset of B, then AUB =

1) A∩B
2) A
3) B
4) ɸ

( )

The number of subset of the set {10,11,12} is

1) 7
2) 6
3) 8
4) 3

( )

10)

If A is a proper subset of B, then A∩B =

1) ɸ
2) AUB
3) B
4) A

( )

Which one of the following is a finite set

1) {x : x € Z, x < 5 }
2) {x : x is an even prime number}
3) 10} ' title="{x : x € N, x > 10} "/> {x : x € N, x > 10}
4) { x : x € W, x ≥ 5}

Answer: 2

SOLUTION 1 :

Hint: [{ x : x is an even prime number} = {2}, which is finite]

The number of elements of the set { x ; x € Z, x² = 1 } is

1) 3
2) 2
3) 1
4) 0

Answer: 2

SOLUTION 1 :

ans = 2

Hint: [ { x : x € Z, x² = 1} = { -1, 1}]

If A = { 5,{5,6} 7,} Which of the following is correct

1) {6} € A
2) {7} € A
3) {5} € A
4) {5,6} € A

Answer: 4

SOLUTION 1 :

{5,6} € A

If n(X) = m, n(Y) =n and n(X∩Y) = p then n(XUY) =

1) m+n+p
2) m-p
3) m+n-p
4) m-n+p

Answer: 3

SOLUTION 1 :

Hint: [n(XUY) = n(X)+n(Y) – n[(X∩Y) = m+n-p)]

ans = m+n-p

If A = { 3,4,5,6} and B = { 1,2,5,6}, then AUB =

1) { 1,2,3,4,6}
2) {1,2,5,6}
3) {3,4,5,6}
4) {1,2,3,4,5,6}

Answer: 4

SOLUTION 1 :

Ans = {1,2,3,4,5,6}

If X = {a{ b, c }d}, Which of the following is subset of X

1) {b,c}
2) {a,b}
3) {c,d}
4) {a,d}

Answer: 4

SOLUTION 1 :

{ c,d}

If U = {1,2,3,4,5,6,7,8, 9,10} and A= {2,5,6,9,10} A' is

1) {1,3,5,10}
2) ɸ
3) {1,3,4,7,8}
4) {2,5,6,9,10}

Answer: 3

SOLUTION 1 :

Hint: [ A" = U – A { 1,2,3,4,5,6,7,8,9,10} – {2,5,6,9,10} ={ 1,3,4,7,8}]

ans = {1,3,4,7,8}

If A is a proper subset of B, then AUB =

1) B
2) A
3) A∩B
4) ɸ

Answer: 1

SOLUTION 1 :

Hint: [ AUB = set of all elements common to both A and B]

Ans = B

The number of subset of the set {10,11,12} is

1) 7
2) 6
3) 3
4) 8

Answer: 4

SOLUTION 1 :

Hint: [ Number of subsets = 2^m = 2³ = 8 (Here there are three elements m = 3)]

Ans = 8

10)

If A is a proper subset of B, then A∩B =

1) B
2) ɸ
3) AUB
4) A

Answer: 4

SOLUTION 1 :

Hint: [ A∩B = set of all elements common to both A and B] A

Ans = A