There are nine boys in the badminton competition. How to choose three of them? Girls have 10, how to choose two? How to make rules after playing games in one day?

Boys choose one person to go directly to the next round, and the other eight boys compete. They drew lots for each other and selected four. Now five people, draw lots to choose 1, go straight to the next round, and choose two from the other four competitions. Now there are only three left.

Girls draw lots to play with each other and choose five lots. In the next round, they will choose one directly, and the remaining four lots will play with each other and choose two lots. Now there are three lots left, three lots will choose 1, the other two will choose 1, and there are still two.

If you are not satisfied, you can continue to ask questions, and if you are satisfied, you will be given points ~