Question 626523
n C r= (n!)/(r!(n-r)!)


19 C 16 = (19!)/(16!*(19-16)!)


19 C 16 = (19!)/(16!*3!)


19 C 16 = (19*18*17*16!)/(16!*3!)


19 C 16 = (19*18*17)/(3!)


19 C 16 = (19*18*17)/(3*2*1)


19 C 16 = (5814)/(6)


19 C 16 = <font color="red">969</font>


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