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Solution


Q.

Set A has 3 elements and the set B has 4 elements. Then the number of injective mappings that can be defined from A to B is:
1 144  
2 12  
3 24  
4 64  

Ans.

(3)

Ans.   24

Explanation:

The total number of injective mappings from the set containing 3 elements into the set containing 4 elements is P34=4!=24