#Problem 19
#component: a random integer 0-9 representing a problem, 0-7=correct and 8-9=wrong
#trial: generate six random integers
#response: Did we get them all correct?
#statistic: proportion

import random
num_trials = 100000
correctproblems = 0
for x in range(num_trials):

    #trial
    correct = True
    for n in range (6):

        problem = random.randint(0,9)
        if problem > 7:
            correct = False

    if correct:
        correctproblems=correctproblems+1

    #response

print(correctproblems/num_trials)