Mathematics W.S - VIII IX - CBSE – TECHNO
1 Sri Chaitanya Schools
I. Straight Objective type Questions :
1. If R = {(1, 2), (3, 4), (5, 6)}, then range (R–1) = [ ]
a) {1, 3, 5} b) {2, 4, 6} c) {1, 4, 6} d) {2, 3, 5}
2. If A = {2, 4} and B = {3, 4, 5}, then A B A B is [ ]
a) {(2, 2) (3, 4) (4, 2) (5, 4)} b) {(2, 3) (4, 3) (4, 5)}
c) {(2, 4) (3, 4) (4, 4) (4, 5)} d) {(4, 2) (4, 3) (4, 4) (4, 5)}
3. Let A be a set containing 10 distinct elements and B has 5 distinct elements, then A × B has
–––– elements
a) 15 b) 105
c) 5 d) 50
4. In order that a relation R defined on a non – empty set A is an equivalence relation. It is
sufficient, if R is [ ]
a) reflexive b) symmetric
c) transitive d) possesses all the above three properties
5. In the set, A = {1, 2, 3, 4, 5}, a relation R is defined by, R = {( , ): , } x y x y Aand x y .
Then R is [ ]
a) reflexive b) symmetric c) transitive d) none
6. If R is a relation from a finite set A having m elements to a finite set B having n elements, then
the number of relations from A to B is [ ]
a) 2mn b) 2mn –1 c) 2mn d) mn
II. Matrix Matching :
Column – I Column – II
If R is a relation from A to A, n(A) = n
Nature of the Relation Number of Relations
7. Reflexive relations [ ] a) ( 1)
2 2
n n
8. Symmetric relations [ ] b)
( 1)
2 2 . 3
n n
n
9. Anti – symmetric relations [ ] c) ( 1)
2 2
n n
10. equivalence relations [ ] d) 2n (n –1)
FIRST ANSWER WILL BE MARKED AS BRAINLIEST ANSWER
UNWANTED ANSWERS WILL BE REPORTED
Answers
Answer:
Mathematics W.S - VIII IX - CBSE – TECHNO
1 Sri Chaitanya Schools
I. Straight Objective type Questions :
1. If R = {(1, 2), (3, 4), (5, 6)}, then range (R–1) = [ ]
a) {1, 3, 5} b) {2, 4, 6} c) {1, 4, 6} d) {2, 3, 5}
2. If A = {2, 4} and B = {3, 4, 5}, then A B A B is [ ]
a) {(2, 2) (3, 4) (4, 2) (5, 4)} b) {(2, 3) (4, 3) (4, 5)}
c) {(2, 4) (3, 4) (4, 4) (4, 5)} d) {(4, 2) (4, 3) (4, 4) (4, 5)}
3. Let A be a set containing 10 distinct elements and B has 5 distinct elements, then A × B has
–––– elements
a) 15 b) 105
c) 5 d) 50
4. In order that a relation R defined on a non – empty set A is an equivalence relation. It is
sufficient, if R is [ ]
a) reflexive b) symmetric
c) transitive d) possesses all the above three properties
5. In the set, A = {1, 2, 3, 4, 5}, a relation R is defined by, R = {( , ): , } x y x y Aand x y .
Then R is [ ]
a) reflexive b) symmetric c) transitive d) none
6. If R is a relation from a finite set A having m elements to a finite set B having n elements, then
the number of relations from A to B is [ ]
a) 2mn b) 2mn –1 c) 2mn d) mn
II. Matrix Matching :
Column – I Column – II
If R is a relation from A to A, n(A) = n
Nature of the Relation Number of Relations
7. Reflexive relations [ ] a) ( 1)
2 2
n n
8. Symmetric relations [ ] b)
( 1)
2 2 . 3
n n
n
9. Anti – symmetric relations [ ] c) ( 1)
2 2
n n
10. equivalence relations [ ] d) 2n (n –1)
FIRST ANSWER WILL BE MARKED AS BRAINLIEST ANSWER
UNWANTED
Answer:
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