Check your intuition: The birthday problem - David Knuffke

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Check your intuition: The birthday problem - David Knuffke with tags ted, ted-ed, ted education, ted ed, birthday, birthday problem, twins, leap year, calendar, probability, combinatorics, paradox, counterintuitive

View full lesson: http://ed.ted.com/lessons/check-your-intuition-the-birthday-problem-david-knuffkeImagine a group of people. How big do you think the group would have to be before theres more than a 50% chance that two people in the group have the same birthday? The answer is probably lower than you think. David Knuffke explains how the birthday problem exposes our often-poor intuition when it comes to probability. Lesson by David Knuffke, animation by TED-Ed.