#include <stdio.h>
void main(){
	int arr[3][4] = {{3,4,5,4},{1,2,3,4},{7,8,6,4}};
	int i = 0;
	int j = 0;
	int sum = 0;
	float mit = 0;
	for(i=0;i<=2;i++){
		for(j=0;j<=3;j++){
			sum = sum + arr[i][j];
		}
	}
	mit = sum / 12;
	printf("La media de los valores es: %0.2f",mit);
}