SOLUTION: in a building, 120 people work on the second floor, 80 people work on the 3rd floor, and 100 people work on the 4th floor. if 20 people stepped into the elevator on the ground floo

Question 31071: in a building, 120 people work on the second floor, 80 people work on the 3rd floor, and 100 people work on the 4th floor. if 20 people stepped into the elevator on the ground floor on their way to work, how many would you expect to get out on the second floor? answer: a:8.... b:9.....c:10.....d:12....
Found 2 solutions by checkley71, Paul:
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
the total number of people who work on th second, third & fourth floors are 200.
20 people get on therfore 120/200=x/20 or x=12 people should get off on the second floor.
correct answer =d:12
Answer by Paul(988) (Show Source): You can put this solution on YOUR website!
The total number of people are 300:
Let the number of second floor people be x
Equation:

Cross multiplyL
300x=20(120)
300x=2400
x=8

Hence the people of the second floor would be 8.
Paul.
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