Ace是面牌还是编号牌？
概率可以定义为发生特定事件的机会。机会的范围在 0 到 1 或 0 到 100 之间（以百分比计）。但是，如果一个事件的概率为 0，则该事件是可疑事件，称为不可能事件。另一方面，如果一个事件的概率为 1，则它将是某个事件。在样本空间中，所有事件的概率加起来为 1。概率的一些用途是在降雨预测、掷硬币、掷骰子、体育和棋盘游戏中。
与概率有关的重要术语
在学习概率中使用的术语之前。我们先来看看概率的基本描述和用来求概率的公式。概率基本上说明了事件发生的可能性。概率的公式是，
Probability of an event = Number of favorable results/ Total number of results
Note: The probability unfailingly lies between 0 and 1.
0 ≤ P ≤ 1
例如，在一个公平的两面硬币上捡到一个正面的概率 = 1/2。截至目前，每个硬币有 1 个正面，总有利结果为 2。
- 实验：其结果最终不为人知的观察称为实验。
- 随机实验：这是一个重复多次并得出不同结果的观察结果。预测任意试验的结果称为概率。从一副牌中挑选一张牌是随机实验的一个实例，因为在每一轮，人们都会挑选一张不同的牌。
- 结果：随机试验产生不同的结果，称为结果。在掷硬币时，假设获得正面。因此，抛硬币是一个随机实验，结果是“正面”。
- 样本空间：随机实验的所有可实现结果构成样本空间。例如，如果掷骰子，则选择 0 或 6。总而言之，样本空间的数字为 1 到 6。这意味着如果掷骰子，样本空间或可能的结果为 6。
- 事件：当单个试验发生时，其结论称为事件。抛硬币时捡起正面是事件的一个实例。一般用“E”表示。
- 可能的结果：实验中所有可能发生的结果都是可能的结果。例如，在抛硬币时，要么捡起正面，要么捡起反面，因此在这种情况下有 2 个可行的结果。
- 不可能事件：发生可能性为0的事件称为不可能事件。例如，在掷出 6 面骰子时获得 17 是不可能的。
- 独立事件：如果一个事件的发生不影响另一事件的发生，则称两个事件是独立的，反之亦然
Ace是面牌还是编号牌？
解决方案：
A deck of cards contains 52 cards which has 4 suits: diamonds, hearts, clubs, and spades.
Each suit of a deck has 13 cards namely, Ace, King, Queen, Jack, 10, 9, 8, 7, 6, 5, 4, 3, 2.
Each suit has only three face cards: King, Queen, and Jack.
Therefore, Ace card is a numbered card.
类似问题
问题 1：找出一副 52 张牌中的 Jack 牌数量？
解决方案：
A deck of cards contains 52 cards which has 4 suits: diamonds, hearts, clubs, and spades.
Each suit of a deck has 13 cards namely, Ace, King, Queen, Jack, 10, 9, 8, 7, 6, 5, 4, 3, 2.
Each suit has only three face cards: King, Queen, and Jack.
Each suit has only one Jack card.
Total Jack cards will be No of suit times No of Jack card in one Suit.
Total Jack cards is equal to 4 × 1 that is 4.
Therefore, there are four Jack cards in a deck of 52 cards.
问题 2：如果从一副洗好的 52 张牌中随机挑选一张牌，得到红色国王的概率是多少？
解决方案：
A deck of cards contains 52 cards which has 4 suits: diamonds, hearts, clubs, and spades.
Each suit of a deck has 13 cards namely, Ace, King, Queen, Jack, 10, 9, 8, 7, 6, 5, 4, 3, 2.
Each suit has only three face cards: King, Queen, and Jack.
There are two red suit and each of the suit has only one King card.
Total Red King cards is equal to No of red suit times No of King card in one Suit.
Total Red King cards will be 2 × 1 that is 2
Probability = 2/52 = 1/26
Therefore, the probability of getting a king of the red suit is 1/26 in a deck of 52 cards.
问题 3：如果从一副洗好的 52 张牌中随机挑选一张牌，求出黑王的概率。
解决方案：
Total number of cards = 52
Number of black kings = 2
Total Black king cards is equal to No of black suit times No of King card in one Suit.
Total Black King cards will be 2 × 1 that is 2
Probability = 2/52 = 1/26
Therefore, the probability of getting a king of the black suit is 1/26 in a deck of 52 cards.
问题 4：如果从一副洗好的 52 张牌中随机挑选一张牌，求得到一张 A 牌的概率。
解决方案：
A deck of cards contains 52 cards which has 4 suits: diamonds, hearts, clubs, and spades.
Each suit of a deck has 13 cards namely, Ace, King, Queen, Jack, 10, 9, 8, 7, 6, 5, 4, 3, 2.
Each suit has only three face cards: King, Queen, and Jack.
Each suit has only one ace card.
Total Ace cards will be No of suit times No of Ace card in one Suit.
Total Jack cards = 4 × 1 = 4
Probability = 4/52 = 1/13
Therefore, the probability of getting an Ace card is 1/13 in a deck of 52 cards.
问题 5：如果从一副洗好的 52 张牌中随机挑选一张牌，求得到 6 的概率。
解决方案：
Each suit has only one 6 card.
Probability = 4/52 = 1/13
Therefore, the probability of getting a 6 card is 1/13 In a deck of 52 cards.