my questions is the following stats problem 18!/10!8!

Question

need helping solving 18!/10!8!. please help

Answer 1

This can be written:

(18×17×16×15×14×13×12×11×10×9×8×7×6×5×4×3×2×1)

(10×9×8×7×6×5×4×3×2×1)(8×7×6×5×4×3×2×1)=

9×17×2×13×11=43758, which is the same as ¹⁸C₈, the number of combinations of selecting 8 items from 18 items.