Coin flips don't truly have a 50/50 chance of being heads or tails. Researchers who flipped coins 350,757 times have confirmed that the chance of landing the coin the same way up as it started is around 51 per cent

https://www.newscientist.com/article/2397248-coin-flips-dont-truly-have-a-50-50-chance-of-being-heads-or-tails/