Among the nine national table tennis teams, there are three Asian national teams, which are divided into three groups, A, B and C, for the preliminaries. The trial is: (1) there are three groups respe

Among the nine national table tennis teams, there are three Asian national teams, which are divided into three groups, A, B and C, for the preliminaries. The trial is: (1) there are three groups respectively. When nine teams are divided into three groups: A, B and C, there are three possible results, such as C 9 3 C 6 3 C 3 3.

(1)∵ Three Asian national teams are divided into three groups: A, B and C, with each team scoring three points.

The other six teams are divided into three groups on average: group A, group B and group C, with two points: C 6 2 C 4 2 C 2 2.

So each of the three groups has an Asian national team, and the result is a 3 3? C 6 2 C 4 2 C 2 2 species,

Q probability P(A)= A 33? C 26 C 24 C 22 C 39 C 36 C 33 = 9 28。

That is, the probability that each of the three groups has an Asian national team is 9.28.

(2) Event "At least two Asian national teams are in the same group"

Contrary to the event "each of the three groups has an Asian national team".

The probability is 1-928 = 1928.

That is to say, the probability of at least two Asian national teams in the same group is 1928.