//C program for finding binomial distribution Expression.
#include<stdio.h>
#include<conio.h>
#include<math.h>
int
facto(int);
void
main()
{
int n,r,nr,factN,factR,factNR;
double p,result;
clrscr();
printf("binomial
distribution\n");
printf("enter the value of
n:");
scanf("%d",&n);
printf("enter the value of
r:");
scanf("%d",&r);
printf("enter the value of
p:");
scanf("%lf",&p);
nr=n-r;
factN=facto(n);
factR=facto(r);
factNR=facto(nr);
result=(((factN/factR)*factNR)*pow(p,r)*(pow((1-p),nr)));
printf("\n
result=%.3lf",result);
getch();
}
int
facto(int n)
{
return (n==1 || n==0) ? 1 :
facto(n-1)*n;
}
