# Probability

## Introduction

Using probability, you can calculate how likely something is to happen. Probability is a very important topic and it is also very helpful in real life situations. In the probability lessons on ultimate maths, you can learn how to express the probability of one or multiple events as well as solving probability without replacements.

### The Language of Probability

There is a special way to write probability in a mathematical way. This is called the language of probability. It is very important that you know how to express probability.

### Finding Probability of Combined Events

Finding probability is the main lesson of this topic. You will learn how to find the probability of single or combined events using tree or sample space diagrams.

### Probability Without Replacement

Probability can be calculated with and without replacement. Probability without replacement means that the probability changes because we have removed something. For example if we take out 2 coloured marbles out of a bag (one after the other without replacing them), the probability of the colour of the second marble will be different. Getting Started The first thing you should do is to learn the language of probability so that you will be able to express the probabilities once you learned how to calculate them. Please share this page if you like it or found it helpful!
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