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30 Sep 2010, 05:11
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
26% (01:10) correct
74%
(00:59)
wrong
based on 110
sessions
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Not Attempted Yet
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
A. 144
B. 12
C. 24
D. 64
E. 124
30 Sep 2010, 05:45
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pzazz12
Injective function is not tested on GMAT, so I wouldn't worry about this problem at all.
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.
