Section: Math Section 1

12) In a downtown building, there are 6 floors and the number of rooms on each floor is R. If each room has exactly C chairs, which of the following gives the total number of chairs in the building?

1. 6R+C
   
2. 6R + 6C
3. ⁶/_RC
4. 6RC
5. .6RC

There are 6 floors, R rooms per floor, and C chairs per room. If you multiply 6 floors by R ^rooms/_floor, the unit "floors" will cancel out, leaving you with 6R rooms and if you multiply 6R rooms by ^chairs/_room, the unit "rooms" will cancel out, leaving 6RC chairs in the building.