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Mathematics 24 Online
OpenStudy (anonymous):

12P4

OpenStudy (hoblos):

12P4 = 12! / (12-4)!

jimthompson5910 (jim_thompson5910):

nPr = (n!)/((n-r)!) 12P4 = (12!)/((12-4)!) 12P4 = (12!)/(8!) 12P4 = (12*11*10*9*8!)/(8!) 12P4 = 12*11*10*9 12P4 = 11880

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