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cracksat
 Post subject: SAT Math : Counting Methods
PostPosted: Mon Jul 12, 2010 6:15 pm 
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Joined: Tue May 22, 2007 1:28 pm
Posts: 19
Question

In how many ways can 4 boys be assigned to 3 different rooms such that no room is empty?

A. 3C1* 2!

B. 4C2* 3C1

C. 4!

D. 4!/2!

E. 4C2 * 3!

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dave
 Post subject: Re: SAT Math : Counting Methods
PostPosted: Sat Jul 24, 2010 10:09 am 
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Choice E

4C2 * 3!
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cracksat
 Post subject: Re: SAT Math : Counting Methods
PostPosted: Tue Aug 03, 2010 3:46 pm 
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Joined: Tue May 22, 2007 1:28 pm
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Your answer is correct.

Detailed explanation is given at http://sat-question-bank.cracksat.com/s ... on_2.shtml

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