rating_salings

count_models = int(input())
rating = 0
possible_sales = 0
total_sales = 0
all_rating = 0

for number in range(1, count_models+1):
    current_num = int(input())
    rating = current_num % 10
    all_rating += rating
    possible_sales = current_num // 10

    if rating == 2:
        total_sales += 0
    elif rating == 3:
        total_sales += possible_sales * 0.50
    elif rating == 4:
        total_sales += possible_sales * 0.70
    elif rating == 5:
        total_sales += possible_sales * 0.85
    elif rating == 6:
        total_sales += possible_sales

print(f"{total_sales:.2f}")
print(f"{all_rating / count_models:.2f}")