China Naming Network - Company naming - It is known that there are three weak teams among the eight teams, and these eight teams are divided into group A and group B by drawing lots, with four teams in each group.
It is known that there are three weak teams among the eight teams, and these eight teams are divided into group A and group B by drawing lots, with four teams in each group.
1. As long as two of the three weak teams lose to A or B, the probability of 1 group = (2/3) * (1/2) = 1/3.
2 A The probability of having 1 a weak team =1/3 * (1/2) =1/6.
The probability that A has 0 weak teams = C33 * 1/2 = 1/2 (choose three weak teams to go to Group B)
The probability that there are at least two weak teams in Group A =1-1/6-1/2 =1/3.