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by gmat740 » Tue Jul 21, 2009 5:49 pm
A certain university will select 1 of 7 candidates eligible to fill a position in the
mathematics department and 2 of 10 candidates eligible to fill 2 identical positions in the computer science department. If none of the candidates is eligible for a position in both departments, how many different sets of 3 candidates are there to fill the 3 positions?
A. 42
B. 70
C. 140
D. 165
E. 315

I know this is a very simple problem,but I am not able to get the OA
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by tohellandback » Tue Jul 21, 2009 5:52 pm
IMO E

7C1*10C2=315
The powers of two are bloody impolite!!
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by shibal » Tue Jul 21, 2009 5:59 pm
IMO E 315
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by gmat740 » Tue Jul 21, 2009 7:01 pm
yeah it is E

Thanks a lot. It was such a simple question!
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