If a horse is the favourite and is paying $1.80 for the win. how much money would i have to bet to win a profit of $50.
If you still want to win a profit from the horse, then you would bet for $27.8. If one horse pays $1.80 and you want to make a profit of $50, you will take 50/1.08 and get 27.8.
About thirty bucks