I flip a fair Swiss franc* and it falls in mousse**. What is the probability that the coin stays on its edge after the mousse melts?
*One Swiss franc is about 1 USD; diameter 23.20mm , thickness 1.55mm, weight 4.4g. During a coin toss, the coin is thrown into the air such that it rotates edge-over-edge several times.
**A mousse (French ‘foam’) is a prepared food that incorporates air bubbles to give it a light and airy texture.
The probability that the coin stays on its edge is about 4% for a Swiss franc and 5% for an American dime.
Such an outcome on a hard and flat surface is fairly unlikely, having been estimated at approximately 1 in 6000 tosses.