Re: Discussion Problem_(19)
Posted by
Sinistral on
May 29, 2013; 9:55am
URL: http://discussion-forum.276.s1.nabble.com/Discussion-Problem-19-tp7581421p7581448.html
oh.. i made a mistake earlier. I calculated for "2 brothers cant sit together" rather than calculating for "exactly one person has to sit in between those 2 brothers".
and yes.. the answer should be: 18C1 *2 * 17!
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