20 People Picking

As of the 23rd May 2022 this website is archived and will receive no further updates.

understandinguncertainty.org was produced by the Winton programme for the public understanding of risk based in the Statistical Laboratory in the University of Cambridge. The aim was to help improve the way that uncertainty and risk are discussed in society, and show how probability and statistics can be both useful and entertaining.

Many of the animations were produced using Flash and will no longer work.

In Pick a Number - Level 1 we showed there is a 13% chance of a duplicate if 20 people choose a number between 1 and 100.

Give method for calculating that all different numbers chosen, for particular numbers, like 20 out of 100.

In Pick a Number - Level 3 we give a general formula.