[" 15.If the set A contains "5" elements and the set B contains 6elements,the number "],[" of one-one and onto maping from A to B is equal to "]

If the set A contains 5 elements and the set B contains 6 elements, then the number of one-one and onto mappings from A to B is

If a set A contains 5 elements and the set B contains 6 elements, then the number of one-one and onto mapping from A to B is

If the set A contains 5 elements and the set B contains 6 elements , then the number of one -one and onto mapping from A to B is ....

If a set A contain 7 elements and the set B contain 9 elements, then the number of one-one and onto , mappings from A to B is :

If the set A contains 5 elements and the set B contains 6 elements, then the number of one-one and onto mappings from A to B is (a) 720 (b) 120 (c) 0 (d) none of these

If the set A contains 5 elements and the set B contains 6 elements,then the number of one- one and onto mappings from A to B is (a) 720 (b) 120 (c) 0 (d) none of these

If the set A contains 5 elements and the set B contains 6 elements, then the number of one-one and onto mappings from A to B is 720 (b) 120 (c) 0 (d) none of these