Probability of Combined Events | 复合事件的概率

📚 Probability of Combined Events | 复合事件的概率

When a Cambridge KS3 question asks for the chance of two or more things happening together, you are working with combined events. This topic builds on basic probability by introducing organised lists, two-way tables and tree diagrams to find the probability of outcomes such as ‘a head and a six’.

当剑桥KS3的题目要求计算两个或多个事件同时发生的概率时，你正在处理复合事件。本主题在基础概率之上，通过引入有序列表、二维表和树形图来求解诸如“正面朝上且骰子为6”等结果的概率。

The ideas in this unit appear frequently in checkpoint assessments and in later IGCSE work. Being able to list outcomes systematically is just as important as getting the final fraction.

本单元的知识在Checkpoint评估以及后续IGCSE学习中经常出现。能够系统地列出结果与得到最终分数同样重要。

1. What is a combined event? | 什么是复合事件？

In probability, a combined event is an event made up of two or more separate events. For instance, if you roll a dice and flip a coin at the same time, the result ‘a 6 on the dice and heads on the coin’ is one combined outcome. The collection of all possible combined outcomes is called the sample space.

在概率中，复合事件是由两个或多个单一事件组成的事件。例如，如果同时掷一个骰子和抛一枚硬币，结果“骰子为6且硬币正面朝上”就是一个复合结果

Published by TutorHao | KS3 Mathematics Revision Series | aleveler.com

更多咨询请联系16621398022（同微信）