Question

How many one to one correspondence are possible for these:
set A = {1, 2, 3, 4} and
set B = {a, b, c, d}

Answer 1

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Hey

Here is your answer,

The first element from the first set can be paired with any of the other 4 elements.

The second element from the first set can be paired with any of the remaining 3 elements from the second set.

…

So, 4x3x2x1 = 4! = 24 would be the total number of combinations.

Hope it helps you!

Answer 2

24 is the answer. This is the answer.