Question 875676
9 C 4 = (9!)/(4!*(9-4)!)



9 C 4 = (9!)/(4!*5!)



9 C 4 = (9*8*7*6*5!)/(4!*5!)



9 C 4 = (9*8*7*6)/(4!)



9 C 4 = (9*8*7*6)/(4*3*2*1)



9 C 4 = 3024/24



9 C 4 = <font color="red">126</font>