Binomial Coefficient Calculator n choose k = C(n,k). n k C(n,k) 120 Step-by-step with your numbers: 1. Values used: 2. n = 10 3. k = 3 4. C(n,k) = 120 Did we solve your problem today? 👍 Yes 👎 No Thanks for the feedback! Number of ways to choose k from n. FAQ Pascal? C(n,k)=C(n-1,k-1)+C(n-1,k). Related calculators Combination Calculator (nCr) Count how many ways to choose r items from n (order doesn't matter). Permutation Calculator (nPr) Count ordered arrangements of r items chosen from n. Pascal's Triangle Calculator Row n of Pascal's triangle.