Factorial vs Combinations — Counting Principles

Compare factorial and combination calculations. See how factorials underpin combination formulas.

Factorial Calculator n!

Enter n (0 – 170)

n! = 1×2×3×...×n

C(n,r) — order does not matter

n (total items)

r (items chosen)

คุณสมบัติ	Factorial Calculator n!	Combinations (nCr)
หมวดหมู่	math	math
หน้าเต็ม	Factorial Calculator n!	Combinations (nCr)