beginner

Introduction to Probability

Probability helps you make smarter decisions—from judging risks to interpreting data. In this path, you’ll learn to calculate chances, estimate probabilities from experiments, build useful models, and solve multi-stage problems with confidence using only basic arithmetic.

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Verified skills you'll gain

DEVELOPING

Computing Probabilities of Compound Events

INTERMEDIATE

Computing Probabilities of Simple Events

DEVELOPING

Interpreting Probabilities

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Course 2

Probability from Experiments

4 lessons

16 practices

You'll discover how to estimate probability from real data by computing relative frequencies, see why small samples can be misleading, and observe how estimates stabilize as you collect more trials.

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Course 3

Building Probability Models

5 lessons

21 practices

You'll learn to build formal probability models for chance processes — both with and without equally likely outcomes — use models to predict expected frequencies, and evaluate models by comparing predictions to observed data.

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Course 4

Compound Event Probability

5 lessons

20 practices

You'll extend probability to events with two or more stages by using organized lists, tables, tree diagrams, and simulation to find and interpret compound event probabilities.

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Senior Machine Learning Engineer

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I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11