Solution: excel randomly selects 3 people from 9 people (different probabilities).

With different probabilities, it seems that "Zhao and Qian" are less likely, accounting for 30%, "Sun and Li" accounting for 70%, and "Zhou, Wu, Zheng, Wang and Feng" account for the largest proportion, accounting for 100%.

According to this ratio, a formula can be set.

=INDEX({ "Zhao"; "money" and "sun"; "Li"; "week"; Wu; "Zheng" and "Wang"; "Feng"}, MATCH(RAND (), {0; 0.3; 0.6; 1.3; 2; 3; 4; 5; 6}/7))

Even if three people are selected, there may be duplication, and the second requirement cannot be met.