itachi-san Posted January 2, 2009 Report Share Posted January 2, 2009 How many ways can 8 horses cross the finish line in a race? Quote Link to comment Share on other sites More sharing options...
0 Guest Posted January 2, 2009 Report Share Posted January 2, 2009 wikkied it. P(n,r)= n!/(n-r)! since 0!=1, the answer is 8! = 40320 Quote Link to comment Share on other sites More sharing options...
0 bonanova Posted January 2, 2009 Report Share Posted January 2, 2009 How many ways can 8 horses cross the finish line in a race?I'd go with 4, for any number of horses Spoiler for which might be: [frontward, backward] x [with and without] rider. There could be others perhaps. Just being cute. Quote Link to comment Share on other sites More sharing options...
0 itachi-san Posted January 2, 2009 Author Report Share Posted January 2, 2009 wikkied it. P(n,r)= n!/(n-r)! since 0!=1, the answer is 8! = 40320 There's way more I'd go with 4, for any number of horses Spoiler for which might be: [frontward, backward] x [with and without] rider. There could be others perhaps. Just being cute. well cuteness aside, let's assume it's an actual realistic horse race Some could be doing the cha cha I suppose Quote Link to comment Share on other sites More sharing options...
0 Guest Posted January 2, 2009 Report Share Posted January 2, 2009 (edited) wikkied it. P(n,r)= n!/(n-r)! since 0!=1, the answer is 8! = 40320 What if you take into account that some of the horses could cross the finish line at the same time, which would mean a lot more ways.. also, do all 8 horses finish the race? Edited January 2, 2009 by lemonymelon Quote Link to comment Share on other sites More sharing options...
0 Guest Posted January 2, 2009 Report Share Posted January 2, 2009 8^8 = 16777216 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted January 2, 2009 Report Share Posted January 2, 2009 Horses not finishing the race (now 9^8) = 43046721 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted January 4, 2009 Report Share Posted January 4, 2009 AIm gonna love the many answers on this one Quote Link to comment Share on other sites More sharing options...
0 peace*out Posted January 5, 2009 Report Share Posted January 5, 2009 AIm gonna love the many answers on this one What if everyone explains how they did/do it... 8x7x6x5x4x3x2x1 Quote Link to comment Share on other sites More sharing options...
0 Prof. Templeton Posted January 19, 2009 Report Share Posted January 19, 2009 545,835 Spoiler for mathy bits: 1×1! + 127×2! + 966×3! + 1701×4! + 1050×5! + 266×6! + 28×7! + 1×8! = 545,835 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted January 25, 2009 Report Share Posted January 25, 2009 I think it's Everyone finishes=8^8=16777216 If somepeople dont finish then I believe its 9^8=430467221 <_< Quote Link to comment Share on other sites More sharing options...
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itachi-san
How many ways can 8 horses cross the finish line in a race?
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