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Bijective Function

For mapping f...

Question

For mapping from A to B to be a many - one function, 4 of set A can be mapped with __ of set B.

A

1

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B

2

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C

6

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D

7

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Solution

The correct option is A 1

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Q. The set A has 3 elements and the set B has 4 elements. Then, the number of injective (one-one) mappings that can be defined from A to B is

Q. Let A and B be two sets with a finite number of elements. Assume that there is injective mapping from A to B and that there is an injective mapping from B to A. Prove that there is a bijective mapping from A to B.

A

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B

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