Question

It costs $95 for 20 students to visit an aquarium. How much does it cost for 162 students?

Answer 1

162 students* ($95/ 20 students)= $769.50

The final answer is $769.50~

Answer 2

Set up a proportion:


`(dollars)/(students) = (dollars)/(students)`

`(95)/(20)= (x)/(162)`

Now cross multiply:

`95*1620=15390`

`20*x=20x`

Set it up as an equation:

`15390=20x`

Divide both sides by 20:

`15390/20`

And you get:
x=769.5

But you cannot have a half of a student so you will round it up:

x=770 students.