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# Set A has 3 elements and set B has 4 elements. The number of

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Manager
Joined: 22 Sep 2010
Posts: 92
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Kudos [?]: 112 [0], given: 0

Set A has 3 elements and set B has 4 elements. The number of [#permalink]

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30 Sep 2010, 05:11
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Difficulty:

55% (hard)

Question Stats:

21% (01:31) correct 79% (00:30) wrong based on 34 sessions

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Set A has 3 elements and set B has 4 elements. The number of injections that can be defined from A to B is

A. 144
B. 12
C. 24
D. 64
E. 124
[Reveal] Spoiler: OA
Math Expert
Joined: 02 Sep 2009
Posts: 34509
Followers: 6297

Kudos [?]: 79934 [0], given: 10022

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30 Sep 2010, 05:45
pzazz12 wrote:
Set A has 3 elements and set B has 4 elements. The number of injections that can be defined from A to B is

A. 144
B. 12
C. 24
D. 64
E. 124

But if interested as 3<4 then the number of injections from A to B is $$P^3_4=24$$. But again don't waste your time on this problem.
_________________
Manager
Joined: 22 Sep 2010
Posts: 92
Followers: 2

Kudos [?]: 112 [0], given: 0

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01 Oct 2010, 05:03
Bunuel wrote:
pzazz12 wrote:
Set A has 3 elements and set B has 4 elements. The number of injections that can be defined from A to B is

A. 144
B. 12
C. 24
D. 64
E. 124

But if interested as 3<4 then the number of injections from A to B is $$P^3_4=24$$. But again don't waste your time on this problem.

thank you,but can you explain me little bit clear...........
Math Expert
Joined: 02 Sep 2009
Posts: 34509
Followers: 6297

Kudos [?]: 79934 [0], given: 10022

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01 Oct 2010, 05:36
pzazz12 wrote:
Bunuel wrote:
pzazz12 wrote:
Set A has 3 elements and set B has 4 elements. The number of injections that can be defined from A to B is

A. 144
B. 12
C. 24
D. 64
E. 124

But if interested as 3<4 then the number of injections from A to B is $$P^3_4=24$$. But again don't waste your time on this problem.

thank you,but can you explain me little bit clear...........

_________________
Re: Functions........   [#permalink] 01 Oct 2010, 05:36
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