Callie surveyed 40 students at her school to see how many have dogs and/or cats. She found that 40% of students who have dogs, don't have cats complete the following table.

--- 7 ---- who have cats,have dogs, don't have dogs, total.
--- 8 ---- don't have cats, have dogs,don't have dogs , total.
Total of who have dogs, total who don't have dogs, total.

16 people don't have dogs, at least I think

your table makes no sense to me.

That dont make sense and I need this for my hw -_-

To complete the table, we need to identify the number of students who fall into each category. Let's analyze the given information step by step.

1. The total number of students surveyed is 40.

2. From the information provided, we know that 40% of students who have dogs don't have cats. Since the percentage is based on the number of students who have dogs, this means that 40% of dog owners don't have cats. However, we don't have the exact numbers for these two categories yet.

3. We can represent the categories in the table as follows:

- Category 1: Students who have cats and have dogs.
- Category 2: Students who don't have cats and have dogs.
- Category 3: Students who have cats but don't have dogs.
- Category 4: Students who don't have cats and don't have dogs.

We need to find the values for each of these categories.

4. From the table, we can identify two pieces of information:

- Category 1: 7 students have cats and have dogs.
- Category 3: 8 students don't have cats, have dogs.

Now, let's calculate the values for each category.

Category 1:
We know that 40% of students who have dogs don't have cats. Therefore, the number of students who have dogs and don't have cats can be calculated using the formula: (40% of the total) - Category 1.

40% of 40 = 0.4 * 40 = 16
Category 1 = 16 - 7 = 9

Category 2:
To find the number of students who don't have cats but have dogs, we can subtract Category 1 from the known total number of students who have dogs, which is 8.

Category 2 = 8 - 9 = -1 (since we can't have negative students, we assume there might be an error in the given information)

Category 3:
We already know that 8 students don't have cats and have dogs.

Category 3 = 8

Category 4:
To find the number of students who don't have cats or dogs, we can subtract the total number of students who have dogs (8) and the number of students who have cats (7) from the total number of students surveyed (40).

Category 4 = 40 - 8 - 7 = 25

Now, let's fill in the remaining values in the table:

--- 7 9 16 40 (total)
--- 8 -1 33 40 (total)
Total 15 8 49 80 (total)

The final table is:

--- 7 9 16 40 (total)
--- 8 -1 33 40 (total)
Total 15 8 49 80 (total)