# Thread: Probability word problem: Pet ownership

1. ## Probability word problem: Pet ownership

We have a group of 27 people:

 Pets Owners 0 4 1 9 2 8 3 6

We choose 1 person from the group. What are the odds that the person owns 3 pets if we know that the person owns at least 1 pet?

2. ## Re: Probability word problem: Pet ownership

you have to show some work on these, we're not just going to do them for you.

3. ## Re: Probability word problem: Pet ownership

There are 23 people who own at least 1 pet (you see why that is?) and 6 people who own exactly 3 pets. So the odds of selecting an owner of 3 pets if you know the person has at least 1 pet is ??

4. ## Re: Probability word problem: Pet ownership

Originally Posted by ChipB
There are 23 people who own at least 1 pet (you see why that is?) and 6 people who own exactly 3 pets. So the odds of selecting an owner of 3 pets if you know the person has at least 1 pet is ??
6 / 23 = 0.26

???

5. ## Re: Probability word problem: Pet ownership

Why the "???"? What do you understand about probability? Do you understand the meaning of "odds"?