# Dice # 1
dice_1 = [1, 2, 3, 4, 5, 6]

# Dice # 2
dice_2 = dice_1.copy()

less_than_10 = 0
all_outcomes = 0

# Iterate through
for v1 in dice_1:
    for v2 in dice_2:
# add 1 for every pair to all_outcomes
        all_outcomes += 1
        if v1 + v2 < 10:
# add 1 for pairs that summed up to 9 or below to less_than_10.
            less_than_10 += 1

prob_less_than_10 = less_than_10 / all_outcomes
print(prob_less_than_10)