= Bertrand paradox (probability)
{wiki=Bertrand_paradox_(probability)}
The Bertrand paradox is a problem in probability theory that highlights the ambiguities that can arise when dealing with random experiments that seem intuitively straightforward. It was formulated by the French mathematician Joseph Bertrand in the 19th century. The paradox demonstrates that different methods of defining a "random" choice can lead to different probabilities for the same event. The classic version of the Bertrand paradox involves the following situation: 1. **A Circle and a Chord**: Imagine a circle with a diameter.
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