MCQ s Quiz

1. The number of all one-one functions from set A = {1, 2, 3} to itself is a) 2 b) 6 c) 3 d) 1 Answer 2. A relation R from A to B is an arbitrary subset of a) A × B b) B × A c) A × A d) B × B Answer 3. A relation R in a set A is said to be an equivalence relation, if R is a) symmetric only b) reflexive only c) transitive only d) All of these Answer 4. A1 coincides with the set of all integers in Z which are related to ...A..., A2 coincides with the set of all integers which are related to ...B... and A3 coincides with the set of all integers in Z which are related to ...C... . Here, A, B and C are respectively a) one, zero, two b) zero, one, two c) two, one, zero d) one, two, zero Answer 5. If (a, b) ÎR, where R is a relation, then a) (a, b) is not an ordered pair b) a = b only c) ab = 1 only d) a is related to b under the relation R Answer 6. The relation R defined in the set A = {1, 2, 3, 4, 5, 6, 7} by R = {(a, b) : both a and b are either odd or even}. Then,…