Originally <a href='http://www.sportsbookreview.com/forum/showthread.php?p=22426447'>posted</a> on 08/16/2014:
Sometimes make these type of calculations on SFTC when combining odds from different markets and this type of thing still gets me. In your earlier example +225 feels like a pretty big dog so intuitively, it doesn't feel like it should increase the odds as much when "combined" with the -175 but the math doesn't lie. (175/275 + 100/325 = 1687.5/1787.5)