Introduction to Probability: From Impossible to Certain | 概率入门：从不可能到必然

📚 Introduction to Probability: From Impossible to Certain | 概率入门：从不可能到必然

Probability is a fascinating branch of mathematics that measures uncertainty. Whether you are rolling a die, flipping a coin, or checking the weather forecast, probability provides a way to quantify how likely an event is to occur. In KS3 Cambridge mathematics, you will learn the basics of probability, including the probability scale, how to calculate theoretical probabilities, and how to use diagrams such as sample space tables and tree diagrams to represent combinations of outcomes. Mastering these fundamentals will help you think logically about chance and make informed predictions.

概率是数学中一个迷人的分支，用来衡量不确定性。无论你是在掷骰子、抛硬币还是查看天气预报，概率都提供了一种量化事件发生可能性的方法。在KS3剑桥数学中，你将学习概率的基础知识，包括概率尺度、如何计算理论概率，以及如何使用样本空间表和树状图等图表来表示结果的组合。掌握这些基础知识将帮助你逻辑地思考随机现象并做出有根据的预测。

1. What is Probability? | 什么是概率？

Probability is a measure of the chance that a particular event will happen. It is always expressed as a number between 0 and 1, inclusive. An event with probability 0 is impossible – it will never happen. An event with probability 1 is certain – it will definitely happen. Most everyday events have probabilities somewhere between these extremes, reflecting the uncertainty we experience in real life. In probability theory, an experiment is any process that produces a well-defined outcome, such as tossing a coin or drawing a card from a deck.

概率是对某一特定事件发生几率的度量。它总是用一个介于0和1之间（包括0和1）的数字来表示。概率为0的事件是不可能事件——它永远不会发生。概率为1的事件

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