How to use this tool
- Type n, press nCr or nPr, type r, and press equals—or use the guided n/r fields.
- For probability rules, enter P(A), P(B), and P(A and B).
- For distributions, choose a distribution and enter its labeled parameters.
Included capabilities
- Combinations and permutations
- Complement, union, intersection, conditional, and independent-event rules
- Expected value, variance, and standard deviation
- Random integer, normal, and binomial simulations
- Normal, t, chi-square, and F calculations
- Binomial, Poisson, and geometric probabilities
Calculator-first workflow
The selected tool opens in GraphCore's centered calculator workspace. Desktop support panels remain available at the sides, while the mobile view keeps the active calculator or tool in focus.
Open Probability calculator with nCr, nPr, rules, and distributions in GraphCore
Frequently asked questions
Is this tool free?
GraphCore is currently available as a free browser-based calculator.
Does it work on mobile?
Yes. Mobile entry uses the on-screen calculator and focused tool controls.
Can I install it?
Yes. Supported browsers can install GraphCore as a progressive web app for an app-like and offline-capable experience.