Р₁₀=10!=1*2*3*4*5*6*7*8*9*10= 3628800
16! 16! 13!*14*15*16
А³₁₆= ------------- = --------- = ----------------------- = 14*15*16= 3360
(16-3)! 13! 13!
18! 12!13*14*15*16*17*18 13*14*15*16*17*18
С⁶₁₈= ----------------- = ------------------------------------ = ----------------------------- =
(18-6)!*6! 12!*6*5*4*3*2*1 6*5*4*3*2*1
13*14*15*16*17
= ----------------------------- =18564
5*4*2*1