为什么骰子的编号方式是这样的？

概率是数学的一个分支，它简单地评估某事或事件发生的可能性的数值描述。它是对要发生的事件的估计。一个事件的概率总是介于 0 和 1 之间。它是否以数字或百分比表示。

例如：当一枚硬币被抛向空中时，正面和反面的可能性在两种情况下都是 0.5 或 50%。

概率公式

P(A) = n(A)/n(S)

where,

n(A) is the number of favorable outcomes

n(S) is the total number of outcomes

概率的类型

• 经典概率：它也被广泛写成一种理论概率，它使用样本空间来确定事件将发生与否的数值概率。

P(E) = n(E)/n(S)

• 经验概率：也称为实验概率，它使用实际经验来确定事件的结果。
• 主观概率：它是基于思维或直觉的教育猜测或估计。

为什么所有骰子都按原样编号？

回答：

Dice is a solid cube with markings on its every face. The faces are almost the same as each other. They are used in games running on chances. The individuals pick random numbers to bet on as well as it is used on-board games for rolling to determine the number of moves. The most common type of dice is six-faced dice. It is a six-sided cube with the numbers indicting from 1 to 6.

The opposite faces of six-sided dice are arranged always to sum up to seven. This arrangement gives two possible mirror images in which the numbers 1,2, and 3 may be arranged in a clockwise or anti-clockwise order about a corner.

示例问题

问题 1. 一个盒子包含 20 个黑球、10 个蓝球和 30 个白球。随机抽取黑色、蓝色或白色的概率是多少？

回答：

Number of favorable outcomes n(A) = 60

number of total outcomes n(S) = 60

Now,

P(A) = n(A)/n(S)

      = 60/60 = 1

问题 2. 从 1 到 50 的整数集合中随机选择一个数，计算所选择的数不小于 45 的概率。

回答：

Number of favorable outcomes n(A) = 6

Number of total outcomes n(S) = 50

Now,

P(A) = n(A)/n(S)

       = 6/50

       = 3/25

问题 3. 骰子出现 5 的概率是多少？

回答：

Number of favorable outcomes n(A) = 1

number of total outcomes n(S) = 6

Now,

P(A) = n(A)/n(S)

       = 1/6

问题 4. 为什么要使用概率公式？

回答：

Probability formula is used to estimate possibility of an event to occur. It can be simply calculated by some basic formulas.