Eric and six friends spent a day at the musement park at the end they decided to pair up for roller coaster rides so that each friend would ride with each others exactly once how much rides would be taken
First, take 27-12 to find the number of people who need to ride in cars. 27-12=15 Then, if each car can take 5, do 15 divided by 5, which will give you 3. Therefore, you will need 3 cars.
