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Onto Function

For mapping f...

Question

For mapping from A to B to be an into function, 4 of set A can't be mapped with __ of set B.

A

2

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B

1

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C

0

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D

6

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Solution

The correct option is C 0

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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.

Q. A mapping is selected at random from the set of all the mappings of the set

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Q. A mapping is selected at random from the set of all the mappings of the set

A = {1, 2, . . . ., n}

into itself. Find the probability that the mapping selected is an injection.

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n

elements respectively such that

m \leq n

. A mapping is selected at random from the set of all mappings from

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B

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