Coin flip guide
The law of large numbers in coin flips
As the number of independent fair flips grows, the observed share of heads tends to move closer to its expected value of one half.
A tendency, not a guarantee
The law describes long-run behavior. It does not promise a balanced result in every short batch or an exact split in any finite run.
Try it yourself
Run simulations at different sizes and compare the deviation from 50 percent. The pattern becomes more visible with larger samples.