Question

Dozen of coins spilled onto the floor and rolled everywhere.

Answer 1

depending on the height they fell only an average of 30% would have rolled at all, because the shape of a coin has only 30% of a surface area that has enough energy distribution to move in respect to the circular shape. it is statistically impossible for every coin to have rolled away, especially because of the factor that 12 coins of even varying weights, size, and density, they would collide and collapse, hindering the event that would cause them to roll.