Bionomial Distribution Implementation

BinomialDistribution.cs

using System;

namespace Bionomial_Distribution
{
    class Program
    {
        static void Main(string[] args)
        {
            BionomialDistribution b = new BionomialDistribution();

            double result = b.ProbabilityOfSuccess(0.1, 35, 10);

            Console.WriteLine(result);

            Console.WriteLine("After Rounding = {0}", Math.Round(result, 4));
        }
    }

    /**
     *  @summary: A class provides an implementation for the Binomial Distribution.
     */
    class BionomialDistribution
    {
        /**
         *  @summary: A method that applies the binomial Distribution.
         *  
         *  @param name="probabiltiyOfSuccess", Probability of success on a single trial.
         *  @param name="totalNumberOfUsers",   Number of trials.
         *  @param name="numberOfActiveUsers",  Number of successes (x).
         * 
         */
        public double ProbabilityOfSuccess(double probabiltiyOfSuccess, double numberOfTrials, double numberOfSuccesses)
        {
            double tempResult = 0.0;
            for (long i = 0; i <= numberOfSuccesses; i++)
            {
                tempResult += GetCombinations(numberOfTrials, i) * Math.Pow(probabiltiyOfSuccess, i) * Math.Pow(1 - probabiltiyOfSuccess, (numberOfTrials - i));
            }
            return 1 - tempResult;
        }

        /**
         *  @summary: A straightforward mathematical combinations implementation.
         *  @param name="n" represents the set of numbers we choosing from.
         *  @param name="r" represents the size of a one combination.
         */
        public double GetCombinations(double n, double r)
        {
            return (GetFactorial(n) / (GetFactorial(r) * GetFactorial(n - r)));
        }

        /**
         *  @summary: A recursive factorial method.
         */
        public double GetFactorial(double n)
        {
            if (n <= 0)
                return 1;
            else
                return n * GetFactorial(n - 1);
        }
    }
}