Manchester United, English Premier League team plays 30% of its game at olestra-ford
Manchester United, English Premier League team plays 30% of its game at olestra-ford (on its filed) and 70% of the game out of its field. The team win 50% of the game played out of its filed, and 90% of the game played on its field. According to today’s newspaper, Manchester United win yesterday’s game. What is the probability the game was played out of its field?