The set A has 4 elements and the Set B has 5 elements then the number of injective mappings that can be defined from A to B is
(1) 72
(2) 120
(3) 144
(4) 60
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The set A has 4 elements and the Set B has 5 elements then the number of injective mappings that can be defined from A to B is
(1) 72
(2) 120
(3) 144
(4) 60
The set A has 4 elements and the Set B has 5 elements then the number of injective mappings that can be defined from A to B is
(1) 72
(2) 120
(3) 144
(4) 60
Correct option (2) 120
Explanation:
Number of injective mappings = nPm = 5P4 = 120.