I think the probability of winning for the Banker hand in Baccarat is approximately 45.84%, making it slightly more likely to win than the Player hand. This is because the Banker hand follows a set of rules that give it a slight advantage over the Player hand and I also feel it's important to note that this advantage is offset by the 5% commission charged on Banker hand wins, which brings the effective probability of winning down to around 40.58%.