Mathematics, 29.12.2019 16:31 selfiegymnast

5. how many one-to-one correspondences are there between the sets {a, b,c, d} and {1,2,3,4} if in each sequence
a. b must correspond to 3
b. b must correspond to 3 and d to 4
c. a and c must correspond to even numbers.

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5. how many one-to-one correspondences are there between the sets {a, b,c, d} and {1,2,3,4} if in ea...