Ari went out to the movies with his friends. They spent $42.79 on tickets, popcorn, and candy before tax. What will be the total amount they spent
with 6% tax?
O A. $2.57
B. $45.36
O C.$40.22

6

Step-by-step explanation:

This is a case of combination since the order does not matter, it only matters that there must be a marble in each one inside, therefore we must apply its formula.

xCn = n! / x! * (n - x)!

n, in this case it would be 4 because we must subtract 2 from the total 6, since there must already be one inside in each display case.

x = 2, since it is the number of showcases.

Replacing:

 2C4 = 4! / 2! * (4 - 2)! = 6

Which means that you can in six different ways.