#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);
 }