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  1. using System;
  2.  
  3. public class Test
  4. {
  5. 	public static void Main()
  6. 	{
  7. 		// your code goes here
  8. 		double ans = (ncr(4, 1) * ncr(48, 12) / ncr(52, 13)) *
  9.                         (ncr(3, 1) * ncr(36, 12) / ncr(39, 13)) *
  10.                         (ncr(2, 1) * ncr(24, 12) / ncr(26, 13)) *
  11.                         (ncr(1, 1) * ncr(12, 12) / ncr(13, 13));
  12.             Console.WriteLine("Probability:" + ans);
  13. 	}
  14.  
  15. 	static double ncr(int n, int r)
  16.         {
  17.             double result;
  18.             result = factorial(n) / (factorial(r) * factorial(n - r));
  19.             if (result == 0)
  20.                 Console.WriteLine("n = " + n + " r = " + r);
  21.             return result;
  22.         }
  23.  
  24.         static double npr(int n, int r)
  25.         {
  26.             double result;
  27.             result = factorial(n) / factorial(n - r);
  28.             return result;
  29.         }
  30.  
  31.         static double factorial(int n)
  32.         {
  33.             int c;
  34.             double result = 1;
  35.             for (c = 1; c <= n; c++)
  36.                 result = result * c;
  37.             return (result);
  38.         }	
  39.  
  40. }
Success #stdin #stdout 0.03s 24160KB
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Standard input is empty
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Probability:0.105498199279712
https://ideone.com/RQgllL
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
public

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