Suppose we want to divide the 10 dogs into three groups, one with 3 dogs, one with 5 dogs, and one with 2 dogs. how many ways can we form the groups such that fluffy is in the 3-dog group and nipper is in the 5-dog group?

The correct answer is $13,20.

Step-by-step explanation:

To be able to solve this exercise we must begin by analyzing the information we have:

We know that the store had a 45% discount.

We know that the pair of shorts that Charlie bought cost $ 24.

Now we just have to find out what the amount was deducted from Charlie to determine how much he paid.

If he obtained a 45% discount over 24, we must multiply that percentage by the total amount, and then divide it by 100:

(45. 24): 100 =

1080: 100 = 10.80.

We know then that the total price was discounted $ 10.80.

Thus:

24 - 10.80 = 13.20

In this way we verify that the correct answer is 13.20.