Answer: 2400 people.
Step-by-step explanation:
1. To solve this problem you must round 380 to its greatest place.
2. As you can see, 380 is closer to 400, therefore, you can round it up to 400.
3. Keeping this on mind, you must multiply 400 rooms by 6 people, as following:
4. Therefore, as you can see, the result indicates that the greatest number of people who could be in these rooms at the same time is 2400.