183.一个教授老先生,有7个PROJECT,分给他老人家的A,B,C三个学生,A分两个,B分3个,C分两个,问多少种分法?这是我碰到的唯一一个概率题。 Verson 2 : A professor will assign seven projects to three students. If two students each got 2 projects, and the other one got 3 projects, how many ways are possible? Verson 3 :3个programs 分给7个学生,有2个学生做A,两个学生B ,三个学生C,问几种做法。