Question 884585
(7-12)! is not defined. 
I think you meant (12-7)!
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{{{7!/(12!(12-7)!)=(7*6*5*4*3*2*1)/((12*11*10*9*8*7*6*5*4*3*2*1)*(5*4*3*2*1))}}}
{{{7!/(12!(12-7)!)=1/((12*11*10*9*8)*(5*4*3*2*1))}}}
{{{7!/(12!(12-7)!)=1/(95040*120)}}}
{{{7!/(12!(12-7)!)=1/11404800}}}