Combination Calculator (nCr, nPr)

This yields the generalized equation for a combination as that for a permutation divided by the number of redundancies, and is typically known as the binomial coefficient: n C r =. n! r! × (n - r)!

Clarify mathematic problem

I can clarify any mathematic problem you have.

Expert teachers will give you an answer in real-time

If you're looking for an expert opinion on something, our instructors are always available to give you an answer in real-time.

Focus on your career

I am passionate about my career and enjoy helping others achieve their career goals.

Permutation, Combination and Derangement

Calculate the number of possible combinations given a set of objects (types) and the number you need to draw from the set, otherwise known as problems of the type n choose k (hence n choose k calculator), as well as n choose r (hence

What do our users say?

Sean Garcia

Just saying) Anyway, thank you for the developers for making such an amazing app, it a amazing app, I am able to use it and have rarely any issues with it, love this ♥️♥️. Thank you so much! You dont know how glad i am to discover this app.

Damon Shipton

Ads didn't interupted me. I would fail the exams if I didn't know about this app. Great app, solves questions for all grades and can understand a picture, Crazy to me and just a press of a button and solve every question on my homework, yes please, loved this app as it has many of the features that makes calculation very easy and has a very interactive UI.