python - 简单的 Yahtzee 模拟没有给出正确的结果？

Question

我正在学习 MIT OpenCourseWare 计算机编程入门类(class)，我不确定我是否以正确的方式解决了一个简单的模拟问题。

2. What is the probability of rolling a Yahtzee! on the first roll? That is, what is the probability of rolling five 6-sided dice, and having them all display the same number?
3. Write a Monte Carlo simulation to solve the above problem (the Yahtzee problem), and submit your code as

所以滚动 Yahtzee 的概率是 1/1296 或大约 .077%

这是我运行模拟的代码:

import random

def runYahtzee(numTrials):
    """Runs the classes version of the yahtzee simulation"""

    success = 0
    for i in range(numTrials):

        dices = []
        for i in range(6):
            dices.append(random.randrange(1,7))
        #print dices

        state = True
        for dice in dices:
            if dice != dices[0]:
                state = False
        if state == True:
            print "You got a Yahtzee"
            print dices
            success += 1

    print "numTrials is: " + str(numTrials)
    print "Success is: " + str(success)
    rate = float(success)/numTrials
    return rate

runYahtzee(10000000)

多次运行该程序，我每次都得到大约 .0001258。这是 0.012%，但实际概率约为 0.077%。我在这里做错了什么吗？

Answer 1

你做错的是掷 6 个骰子而不是 5 个。

0.001258 * 6 = 0.0007548

...接近您的 0.077%

改变你的循环:

    for i in range(5):

---

顺便说一句，复数是dice；单数是die。 dices 是错误的，除非你想变得有趣。在这种情况下，您可以使用单数形式的“douse”...never say die!