Relations-quiz-1

The relation R  from a set A to B is a subset of 

• A X B

• B X A

• A X A

• B X B

The relation R on a set A is a subset of

• A X B

• B X A

• A X A

• B X B

If A has 4 elements and B has 5 elements, then the set A X B has.......number of elements.

• 9

• 5

• 4

• 20

The relation R is called an identity ona set A if

• (a, a) €R for all a € A

• (a, a) €R for some a € A

• Both the above are true

• None of these

A relation R is called an equivalence relation if R is

• Reflexive

• Symmetric

• Transitive

• All the above

The relation R is {( 1,2) (2,1) (4,1) (3,3) (1,4)}

• Reflexive

• Symmetric

• Transitive

• All the above

The relation R ={( 1,2) (2,1) (4,1) (3,3) (1,4), (4,4),(2,2), (1,1)} is

• Reflexive

• Transitive

• Both the above

• Neither reflexive nor transitive

The relation is called a universal relation if it contains......

• Some elements of Ax B

• All the elements of Ax B

• Atleast 2 elements

• None of these

If the relation R is {(1,2),(1,1)} on A={1,2},then the complement of R is

• {(1,1),(2,2)}

• {(2,1),(2,2)}

• {(1,2),(2,2)}

• {(1,1),(1,2)}

If R is {(1,1),(2,2), (3,3)} relation on {1,2,3,4,5} , then it's complement has (a)   number of elements