There are 6 groups of 3 people waiting to go on the underground ride. each car can take 4 people. how many cars do you need?

5 cars they need.  

Step-by-step explanation:

Given : There are 6 groups of 3 people waiting to go on the underground ride. Each car can take 4 people.

To find : How many cars do you need?      

Solution :

There are 6 groups of 3 people waiting to go on the underground ride.

i.e. total number of people are

Now, In 1 car take 4 people.

1 people = car

18 people = car      

18 people = car                

Which means 18 people need 5 cars.

Therefore, 5 cars they need.    

b, i believe, but not sure.