Defined model
Pick one particular grain from a beach
- Probability:
- 4.71 × 10⁻¹⁴%
- Odds:
- 1 to (2.12 × 10¹⁵)
- dBan
- −153.3 dBan
Mark one grain on the modelled beach, mix every grain, then pick one: finding the marked grain is a one-in-2.122-quadrillion event.
Calculation
p = 1 in 2.122 × 10¹⁵. N = 1000 × 50 × 1 × 0.60 / ((π/6) × 0.0003³)
Assumptions
The hypothetical beach is 1 km long, 50 m wide, and 1 m deep. The grains are modelled as 0.3 mm spheres with 60% solid packing.
Sources
- Geometric example model