Final answer:
To find the total number of students at the school, double the number of students who went on all trips, resulting in 320 students.
Step-by-step explanation:
The question asks us to determine the total number of students at a school given that 50% went on the first trip, 80% on the second trip, and 90% on the third trip, with a total of 160 students attending all three trips.
Here's how this problem can be solved:
- We are told that the same group of students, which is 160 students, went on all three trips.
- Since these students represent 50% of the school population on the first trip, we can establish that if 50% equals 160 students, then 100% (the total school population) would be twice as many, because 50% is half of 100%.
- Therefore, doubling the 160 students gives us 320 students as the total school population.