April 18, 2017
Problem of the Week
Tuesday, April 18, 2017
There are twenty students in Mr. Manning's class that have mammals as pets. These mammals include dogs, cats, and gerbils. There are 10 students who have dogs, 13 who have cats, and 9 who have gerbils. There are 9 students who have at least 2 of these three animals as pets. How many students have all 3 of these different mammals as pets?