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A question from function.............

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by ashokkadam » Wed Sep 29, 2010 11:47 pm
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


solve it.....
I think B is the answer because we can have 12 possible injections from A to B.
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by ankur.agrawal » Thu Sep 30, 2010 1:54 am
Pls confirm the source. Doesnt looks ike a gmat question
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by diebeatsthegmat » Thu Sep 30, 2010 1:39 pm
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


solve it.....
what does "injection" in maths mean?
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