Can you tell me how this works? In the manga Kakashi sais that only 1 out of 3 graduates (9 students out of 27 - 3 groups )actually becomes a gennin. (Which must mean that most members of the village would never become ninjas despite this being the only job they train for) . And he doesn't seem to communicate with other teachers during the exam. (which would be needed to set the number of passing groups) Still, in the end , there ARE 3 genin groups that year (since Lee's group is one year older.) Am I missing something?