The math problem from Grade One to Grade Two is really urgent. Explain the process: there are ten vacant rooms in a hotel to receive a tour group. When there are three people in each room, only

Solution: Because * * * has ten vacant rooms, when there are three people in each room, * * * can live 10*3=30 people;

And because only one room is not empty and dissatisfied, we will discuss it in different situations:

When there is only one person in an empty dissatisfied room, there are 30-(3- 1)=28 people in the tour group.

When there are only two people in an empty dissatisfied room, there are 30-(3-2)=29 people in the tour group.