science

Although the participants did not work out the mathematical solution — which involves a formula with square roots — their behaviour was a very close approximation of it. “The fact that, even in this simplified setting, they still find that people behave in a quite consistent — and pretty effective — way is quite impressive,” says Choshen-Hillel.

The title states that he solved the dilemma, however the experiment is focused on how closely real life customers' actions approximate the 'formula with square roots' (I mean it's nature, you may publish a formula with roots).

So essentially it is a model? I'm not sure by trading this what it is that Feynman did. I'm interested in said mathematical solution.