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 ??
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 ??