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Q.

Set A has 3 elements and set B has 4 elements. The number of injection that can be defined from A to B is

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a

144

b

12

c

24

d

64

answer is C.

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Detailed Solution

The total number of injective functions from a set A containing 3 elements to a set B containing 4 elements is equal to the total number of arrangement of 4 by taking 3 at a time i.e., 4P3 = 24.

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