Each baseball team has nine players and each football team has eleven players. six schools have both baseball and football teams. four schools have only a baseball team. how many players are there for all ten schools?

156 players in all ten schools

Each baseball team has nine players and each football team has eleven players. Six schools have both baseball and football teams. Four schools have only a baseball team. How many players are there for all ten schools. The answer is 56 players. The six schools have 54 plus 66 players (baseball and football respectively ie 9x6 and 11x6) and the four schools have 9x4 =36 players so 54 + 66 +36= 156 players total.