my math is this. If the game hits the # 2.5% of time than those 3 #'s have a combined 7.5% chance of hitting. 92.5% chance of losing times $10 bucks a loss (one side wins) is $925 in losses. On the plus side is 196 should hit 2.5% of time(winning once and pushing once for $250 profit) 197 hits both sides(250 times both winners =$500) and 198 hits 2.5 % of time with a push on ther side for $250 profit.
Add $250+$500+$250=$1,000 won subtract from $925 loss is net profit of $75. Sounds simple but I think this right.