Question

The number of all one to one functions defined from Set A = {1, 2, 3, 4} to itself is

Answer 1

Answer:

Since f is one-one, thus every element of {1,2,3,4} has either of image {1,2,3,4} an that image is unique.

Therefore,

Total no. of one-one functions =4!=4×3×2×1=24

Step-by-step explanation:

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