It is known that there are three weak teams among the eight teams. By drawing lots, the eight teams were divided into two groups, A and B, with four teams in each group. Find: (1) one of the two group

It is known that there are three weak teams among the eight teams. By drawing lots, the eight teams were divided into two groups, A and B, with four teams in each group. Find: (1) one of the two groups. There are three weak teams and five strong teams. There are four teams in Group A and Group B respectively. When A has two weak teams, C32 times C52=3 times 10=30. If B has two weak teams, the same as above, get 30. There are 60 situations. The probability of the first question is: 60 divided by 6 in C84 = 7. Question 2: According to the answer to the question 1, there are 30 ways to have two weak teams. When there are three weak teams, C33 times C5 1=5. There are 35 kinds that meet the requirements, 35 divided by C84 = 1/2. The topic is oral calculation. You'd better recalculate and stop asking questions. The difficulty of this topic is similar to that of the college entrance examination this year, so you must get it.