Question

In a class 20 of students, 7 have a cat and

8 have a dog. There are 8 students who do
not have a cat or a dog, What is the
probability that a student who has a dog
also has a cat?

Answer 1

`(3)/(20)`

Explanation:

Since there are 20 students, this will be the denominator.

Now, to find how many students have a dog and a cat, you need to subtract all the numbers with 20. The leftover number will be the amount of students.

7+8+8=23

23-20=3

So, there are 3 students who have a dog and a cat.

So, the fraction will be
`(3)/(20)`