The set A has 4 element and the set B ha...

The set A has 4 element and the set B has 5 elements then the number of injective mappings that can be deifned from A to B is

A

144

B

72

C

60

D

120

Text Solution

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The correct Answer is:

D

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If the set A has 3 elements and the set B =(3, 4, 5), then find the number of elements in (A xx B).

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Knowledge Check

If the set A has 3 elements and the set B has 4 elements, then the number of injections (one - one ) that can be defined from A to B is

A

144

B

12

C

24

D

64

If a set A contains 5 elements and the set B contains 6 elements, then the number of one-one and onto mapping from A to B is

A

720

B

120

C

0

D

none of these

If the sets A has p elements, B has q elements, then number of elements is AxxB is

A

p+q

B

p+q+1

C

pq

D

`p^2`

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