Topic
Probability stories
Probability is the branch of maths most reliably at odds with intuition. The famous results are famous precisely because the correct answer still feels wrong once you have worked it through.
These clips take one such result at a time, show the calculation as a shape rather than a formula, and let the counting do the persuading. Many use illustrative figures rather than survey data — arithmetic rather than measurement — and say so.
- Videos
- 0
Every clip here states its source and the period it covers, and carries the underlying numbers on its page as a table you can copy.
What you'll learn
What this topic covers
- Why 23 people are enough for even odds of a shared birthday
- How a 99% accurate test still returns mostly false positives for a rare condition
- What expected value says about lottery tickets, and why people buy them anyway
- Why rare events are near-certain across a large enough population
- How a simulation answers a probability question you cannot solve on paper
Videos
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