It's an intense El Classico-Real Madrid VS Barcelona . Ronaldo has the ball and Real Madrid have decided not to lose possession(not give Barcelona the ball) . So they decide to keep on passing the ball among themselves . There are total of 11 players including Ronaldo . He passes the ball first . In how many ways will Ronaldo get the ball after 7 passes ?
1) No player can pass the ball to himself . Thus every player can pass to any one of 10 other players.
2) When Ronaldo passes the ball to another player(say,Bale) , it counts as one pass . Now Bale can pass the ball back to Ronaldo or any other player which would count as the 2nd pass.