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  2. Set A Has 3 Elements And Set B Has 4 Elements The Number Of Injections That Can Be Defined From A To B Is
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Set A has 3 elements and set B has 4 elements. The number of injections that can be defined from A to B is (1) 144 (2) 12 (3) 24 (4) 64

Solution: (3)

Number of injections that can be defined from A to B = 4P3

= 4! / [4 – 3]!

= 4 * 3 * 2

= 24

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