#include<iostream>
#include<fstream>
#include<string>
#include<vector>
#include<queue>
#include<stack>
#include<cmath>
#include<algorithm>
#include<cstdio>
using namespace std;
int n,m,i,j;
long long v,a;
double v1,v2;
int main()
{
    scanf("%d%d%lld",&n,&m,&v);
    for (i=1;i<=n;i++)
    {
        for(j=1;j<=m;j++)
        {
            scanf("%d",&a);
            v+=a;
        }
    }
    v1=v;
    v1=v1/(m*n);
    v1=v1*100;
    v=(long long)v1;
    v1=(double)v;
    v1=v1/100;
    v2=100;
    printf("%.2f %.2f\n",v1,v2);
    return 0;
}
