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Catalyst: Probability and the birthday paradox

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Woman holds birthday cake while others surround her and blow party whistles
Catalyst: Probability and the birthday paradox

SUBJECTS:  Maths

YEARS:  5–6, 7–8


Even when a maths problem seems simple, it can run counter to our human intuition.

Mathematician Lily Serna poses a maths problem to the Clovelly Bowling Club: how many people do you need to gather to get a 50 per cent chance of any two people in that group sharing the same birthday?

Can you test this solution in your classroom?



Date of broadcast: 9 Nov 2018


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Metadata © Australian Broadcasting Corporation and Education Services Australia Ltd 2012 (except where otherwise indicated). Digital content © Australian Broadcasting Corporation (except where otherwise indicated). Video © Australian Broadcasting Corporation (except where otherwise indicated). All images copyright their respective owners. Text © Australian Broadcasting Corporation and Education Services Australia is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0).

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