If I remember correctly that's a 2.5% house edge, meaning that the casino gets a slight advantage with their odds so that you're basically playing to lose.
If it was 50/50, it would be possible for a lot of people to walk away with more money than they started with. With a house edge, it limits that for a lot of people.
Im puzzling over how they secure the 2.5% house edge, because it will be either hi or lo
Before i choose hi or lo for next roll i have 50% chance at that moment
After i choose say hi, how does my chance of winning increase or decrease
Simply,
0 to 4750 = LOW
4751 to 5249 = HOUSE EDGE
5250 to 10000 = HIGH
There are three choices, but you can only choose two of the three.
No number will come on display that is between 4751-5249
The winning number displayed will be either low or in hi range
Example
Numbers used are 1 to 100
House edge 5%
Hi above 50 and lo below 45
The rolled number will never come in 45-50 range, it will be either of hi or low range, the numbers 45,46,47,48,49,50 are not even used ingame