// program for finding variance of 10 numbers

#include<stdio.h>


void main()
{
	int n,i;
	float avrg,vari,a[20];
	
  	avrg=vari=0.0;

	printf("enter how many numbers are to be read for finding variance\n");
	scanf("%d",&n);

	printf("enter the numbers\n");
	for(i=0;i<n;i++)
	{
		scanf("%f",&a[i]);
		avrg=avrg+a[i];   // adding all the elements so that we can find avg	
	}
	
	avrg=avrg/n;  // finding the avg


	// finding the variance

	for(i=0;i<n;i++)
	{
		vari=vari+((a[i]-avrg)*(a[i]-avrg));
	}
	
	vari=vari/n;
	
	printf("varinace is %f ",vari);

}