Odds makers try to predict which professional and collegefootball teams will win and by how much(the spread). if the oddsmakers do this accurately, adding the spread to the underdog'sscore should make the final score a tie. suppose a bookie will giveyou $6 for ever $1 your risk if you pick the winners in three ballgames (adjusted by the spread) on a "parlay" card. what is thebookies expected earnings per dollar wagered? interpret thisvalue.