r2-2.c

#include <stdio.h>
int main(void)
{
	int i;
	int j;
	int sum;
	int set,data, num;
	
	scanf("%d", &set);
	
	for(i=0;i<set;i++){
		sum = 0;
		scanf("%d", &data);
		for(j=0;j<data;j++){
			scanf("%d", &num);
			sum += num;
		}
		
		printf("%d %.2f\n", sum, (double)sum / data);
	}
	
	return(0);
}